I only attended GBAF once, with Thur/Fri night/Saturday day sessions. Thur a great time, as was Saturday day. Friday madness. Almost a BMC's crowd that was not there to really taste, but to get hammered and puke.. imho. Big lines at Miller/Coors/Bud stands was a sign of doom ;-)
Anyway, my wife and my plan was to hit West of Mississippi beers I could not get back in PA. Still a lot of beer to sample, so settled on more sessions ones on first pass, as suggested by others, then IPA, barely wines, meads, and heavy spiced/flavored beers at end of each session.- Save pepper beers for last, with a session beer to cleanse mouth! Seemed to work pretty well, but risk is always some beer you may want to try are kicked by Saturday.
Enjoy - only other advice is to bring pretzels!