Dragon*Con is basically like 40 minicons in the same space plus some random people who are just there to PARTY! but at its heart, that advice is sound even for that con. it's taken me a few years how to navigate it so it doesn't send me over the edge (and this year is the big test since I'm doing it without Patty's calming influence as she takes her comps), but it's pretty much neither decadent nor trashy unless you want it to be (I am, however, ENTIRELY a magnet for people who are essentially strangers telling me really wild stories though, which is both hilarious and makes me somewhat lament the passing of my wild and crazy youth).