Some folks obsess over the RV toilet. I have never put anything in mine other than a little water after dumping and some deodorizer along with fabric softener (wife corrected me). I would try it out with at least some water before your female guest joins you.
50A service is generally required to power 2 AC units simultaneously, thus the required upgrade. I don't see why you would need 2 units on a trailer that small though. The addition of a 50Ax30A adapter makes any campsite usable. I use the 50A plug any time it is available for my 30A TT. They tend to be in better condition than the 30A plugs.
Contact the manufacturer and have them recommend someone else to do the warranty work. The warranty is not with the dealer and they already have your money. Bump the dealer and never pratonize them again.
St Andrews SP, Henderson Bch SP, Topsail Hill SP, and Grayton Bch SP. My personal favorite is Grayton because it has a FHU loop, is less crowded and is halfway between Panama CB and Destin both of which offer great dining choices.