I have a portable propane two burner stove. I also have 3 propane grills.
During the day we use anything else that is available. DW has titanium knees so she can do whatever she pleases.
Larger holding tanks
When we had the TT my crew cab 2500HD had enough bed space to make up the difference. Like George Carlin said, you can never have too much stuff. Now with the Solera MH I have more exterior storage space than I have weight capacity. Storage is not just space. It is also a weight issue.
Separate room for the kids
Around 8 or so you can stick them in a tent until they are old enough that they don't want to be seen with you in public anymore.
I keep all cold drinks on ice. For the cold beverage of my choice ice works better than the fridge.
More power outlets
I don't use any so I can't help you with that one.