I've played in a suit before, but never gave it much thought.
A mate suggested a payday theme as he bought the official vinyl masks, so we modified them into airsoft masks, (and tested them)
Lined the inside of the jackets with velcro, added some pouches, and it was the most comfortable days airsoft I've had in ages.
Just carry 4 mid caps, a bfg each and some spare 209s in a tic tac box.
45 quid for a suit from matalan, can't remember what he paid for the masks, and some pouches nicked off an old chest rig.