Draw a little sketch of the layout of the place, based on that aerial view picture which you posted, making sure you write in the names of the locations on your drawing. You can take the sketch with you in your pocket to assist you, but that's not the main reason I'm suggesting that you draw the layout (if it was, you might just as easily print it off), no, the reason for sketching it, is that the act of actually drawing it out and writing the names on your sketch will fix the layout in your head.
Doing that is a common recon technique among special forces, incidentally. But as far as you are concerned, it is worth doing because there is nothing worse than being at a skirmish with everyone who is a regular player at that site saying stuff like: 'okay, we'll head up through xxx, and cut round the back of yyy, because they're bound to be covering the Eastern approach to zzz', when you have no idea what those places are, nor where they are in relation to one another because you are not familiar with the layout.
120 rounds is a bit on the lean side for a skirmish, so be sure to stay on semi auto (semi-auto is best anyway most of the time). Take a speed loader, a small gas can and a small bag of ammo with you in addition to your main reload stuff. If that stuff is small enough to carry on person, you can reload a mag when in cover, however, if that stuff is too big to carry, you can cache it in your spawn point, so take some kind of bag that'll make it obvious it is yours and that is waterproof, and leave the necessary stuff in it, so that you can fall back and rearm if necessary, or simply re-arm if you get hit and have to go to your respawn point.
You will get covered in sh*t, especially if you hit the deck and crawl or roll to cover (don't be shy to crawl about and stuff by the way, it's all part of the fun, you'll be surprised how many people do not hit the deck incidentally, but they're the ones who get hit). If you are driving there, take either a change of pants or a plastic bag to put on your car seat for when you drive home, otherwise your car seat will get covered in sh*t too. Your knees will get especially wet from kneeling down, so if you have kneepads, take those (even one will do), otherwise, you can 'waterproof' the knees of your combat pants temporarily, by cutting out squares of a plastic bag and taping those to the inside knee area of your combat pants (might wanna do the ass area too). If you are gonna be there all day, you might also consider wearing either long johns or cycling leggings under your combat pants, because you will be out in the cold for hours, and it will probably help, after all, you can always take 'em off if you are too warm, but you can't put em on if you didn't bring 'em. Don't worry about keeping dry from rain though, in the woods it won't be hitting you much even if it is raining pretty hard, but the forest floor will almost certainly be muddy and wet, so you still need to ensure you don't end up piss wet through all day. If you are wearing leather combat boots, polish the living sh*t out of them, so that they are waterproofed, this will also mean that mud washes off them easier at the end of the day. Two pairs of socks is not a bad idea too, since they will keep your feet warmer when they are out in the cold wet mud all day. If you have gloves, take those too.
Wear lower face protection and neck protection, because you'll be getting sniper fire at 500 fps, and that fecking hurts, especially in the cold, and if it hits you in the mouth, it will smash your teeth in. At a push, a shemagh or other decent scarf will cover your face and neck if you have nothing else, but be aware that a typical black and white shemagh stands out a lot in woodland terrain, so if necessary, dirty it up with mud, or you will be a bullet magnet, similarly, you can stick twigs and leaves etc in your helmet (if you wear one) to break up your profile a bit. If you don't wear a helmet, then wear a cap, it will cover your forehead, and you will be glad of that if a sniper round hits you there. Camo it with mud if it is brightly coloured.
Make sure everything is secure on your gear, you are far more likely to be diving about and crawling in woodland terrain than you are in cqb, and if anything is loose, you will lose it, so tape sh*t up, put stuff in secure pouches. Tighten all the screws and bolts on your weapons, because unlike with indoor CQB, if something drops off your weapon in a forest, you ain't gonna find it, it's gone for good. Leave car keys and phones and stuff like that back in the safe zone (I've seen more than one person get their fancy 500 quid smartphone shot to sh*t by a sniper BB when it was in the leg pocket of their combat pants lol), and looking for a set of car keys in an entire forest by torchlight when you are tired and cold and wet at the end of a day's skirmishing is not something you wanna be doing.
Take some basic repair sh*t with you, gaffer tape, electrical tape, a screwdriver, an unjamming rod, pliers, some silicone lubricant, etc. You can fix almost anything with gaffer tape.
Be a sneaky bastard, crawl through the sh*t that nobody else will crawl through, hide in the bush that everyone else thinks is too tight to hide in. And if you have a pistol, take it, you might think you won't use a pistol at the kind of ranges a woodland fight takes place at, but you'd be wrong, you'll be sneaking up to fortifications and will end up on literally the other side of a bit of plywood or a bush, from your enemies, I can guarantee it will happen, and in those circumstances, a pistol is worth its weight in gold. If you have a rifle sling, be sure to take that too, carrying even a light weapon all day gets tiring.
