In terms of etiquette, with our prior PUP, we avoided 50A service sites and full-hook sites in order to leave them for folks who could take advantage of them. Often, those were large pull-thru sites, and we would've felt odd with a 10' box without even a slideout dinette. We've only had our HW PUP for one season and, at that, we only went on one trip last summer to a state park, so electric was our only real option. But, if we go to a KOA, we MIGHT consider trying a full hook-up for the first time since we have a toilet. Oh, and of course, we don't reserve the paved, wheelchair accessible sites.