We also live in our camper full time from May to September. We are a family of 4 with a 14 and 12 year old. We have a 32' Class C with 2 slides. We do not have a pantry either, but we do have a fair amount of cabinet space in the kitchen. We use shelf helpers like
these which adds a lot of usable space to the cabinets.
We use our oven all the time, probably 3 to 4 times a week, some times more. We have a small cookie sheet from the dollar store that we line with parchment. We have a small 3 pot camping set (from our tent camping days) which comes with an 8 quart stockpot, a 3 quart sauce pan and a 10" Fry Pan. I also have a Calphalon 10" omelette pan that is used a lot, not just for omelettes. We also have a 4 quart pot used only for popping pop corn, which we eat a few times a week (cooked outside). And we have a 6 quart (I think) Crock Pot. In the summer months that is used outside as well. Heats the camper up too much.
Our outside camp kitchen consists of a portable propane grill, 2 burner stove and a charcoal grill with firebox for smoking (if we have company and grill, we'll usually use the smoker as a charcoal grill). We use a 20lb propane tank with a tree extender to power the stove and portable grill.
I think 2gypsies suggestion of a test drive is a good idea. It might not be a bad idea before you go full time to go camping for a couple weeks. Bring everything you have and decide what you need to keep. We have been RVing for 10 years, but it wasn't until we started camping for more than a week or two at a time that we really figured out what we needed.
-Michael