We do have an oven but it doesn't get used very much. Something we did purchase and carry is a small sized crockpot where you can do a number of different recipes when we have an electrical hookup. A plus with a crockpot is the ability to get it set and cooking, leave for the entire day out hiking or whatever, come back "home" and dinner is mostly ready.
We also stock our freezer with sealed items such as pre-marinated tri-tip, Carne Asada, pre-marinated chicken items. All of those get grilled but yes, you need to remember to take them out to defrost. We also leave room in the freezer for the kids to make ice cream. Even teenage kids still love to make ice cream!
