You don't need a full tank of water for a couple of days, and it won't hurt your MPGs much to carry at least some. Some people stock up on bottled water.
Keeping your battery topped up is probably the biggest deal. You should be able to get by for a couple of days, but the fridge and the furnace won't work on a dead battery. If you're careful and you know what your're doing, you can charge your pod battery from your TV, but you really don't want to end up with no Pod battery and no TV battery!!! Solar can be good, but it's iffy, depending on the weather. A generator is the ultimate security, I think. If you get one, get the quietest inverter/generator you can. Minimum 2400 watts if you want air conditioning or microwave, maybe down to 1000 watts or less if you just want to charge the battery and maybe watch TV..
I have used AllStays Camp and RV app in the past. It has a lot of info; almost too much!
Keep an eye on your propane if you'll be using the furnace, especially. (The fridge will run your battery down in hours if you try to run it on battery.) You might consider carrying a spare tank.
TT