Every year I've thought that NAF sounds like a bag of shit.
This year, however, I've been playing exclusively at Red Alert and the staff there all go every year.
I asked why and they explained you don't go expecting good airsoft.
You go for ridiculous airsoft, the big car boot, and a fun social.
I'm going with them this year, so I'll get to see if it's the shitshow I thought it was, or if its ludicrous enough to be enjoyable in a different way.
Worst case scenario I get drunk with friends and spend money on second hand rifs I don't need.