Slides work, water heater works, no propane leaks (spray with soapy water on connections - I had a massive leak on a line once before a trip), check leaf springs, check that you have all of the stuff you need inside (we have forgotten remote for blue-ray player once, knife set, spatula as an example), power cord doesn't have tears (just found one on mine after getting it back from the dealer, luckily not through the inside insulation so just black tape for me). Travel trailers are nice because you don't have to worry about extra stuff (like transmission or radiator or oil, etc. - do have to worry about that with the tow vehicle though). Don't over think it, have fun.
2014 Jayco Jayflight 32BHDS
2015 Ford F250 Lariat 4x4 Crew Cab 6.7L Powerstroke