Doing it once isn't the same as going to a festival though. I'm probably going to a festival in Essex on Friday. Hilarious fun and cheaper than a day at Delta Force!
Totally different doing a festival though. Delta Force and most walk on fields charge through the nose and only offer tiny fields. I went to North vs South back in May and it's an MOD training base and it's massive. Amazing in the dark and so cool in the daytime when there are 30 or 50 of you charging an enemy with smoke grenades and everything