Dont start talking to anyone when unpacking or packing to leave. NEVER EVER walk away while flushing your black tank. There can be a very bad result.
On a lighter note, buy light weight pots, pans, plastic plates, coffee cups, party plastic drinking cups and silverware. Buy underwear, socks, winter and summer coats, shoes, shirts, hats and such and leave them in the coach. In other words, buy everyday stuff that you would use at home and keep it in the coach. Don't buy what you think you need...buy stuff that you DO need. There is always a Wal Mart to get stuff you forgot. Equip the coach so its ready to go except for food.
Keep in mind that weight can be an issue. So don't get carried away loading your coach. A Weber Q bbq is small and light weight. You can get a small 120V pancake compressor that will pump up to 110# PSI from Sears or??. You will need some wheel chocks and maybe some short 4'X10" lumber for leveling your landing gear at times. Get a bag of the plastic leveling blocks to put under your tires if needed for leveling.
You can learn more by walking around campgrounds, looking and asking questions. Then you will figure out your own way of doing things. Better yet, go to a HL rally near you and you will get all the help you need (probably more than you want).