I know personally the majority of the CASA guys that will be there, they are all pilots and GA plane nuts, and beside a newbie I have never met, they are all OK folk when it comes to this stuff. Couple of them are always happy chap pies
No big deal, and even if you had an old chart they will just remind you of why charts change and you should keep up to date.
Of course if you blast through the TRA and do a beat up while the Roulettes are on, they might not be as happy as you would like.
Get in and go, this is the only serious national event on the calendar for GA anymore. Support it or lose it.