If you want to eat hot food or drinks your going to need something to cook with. You can spend $150 on a multi-fuel stove so you can burn auto fuel or Avgas but for just a few overnight trips you might try a AOTU Portable Camping Stove. It uses the disposable butane fuel canisters which I'm sure some folks will object to. Many of those objections would be legitimate if you were backpacking, but your not. This stove will have it's limitations but your not going to find a smaller lighter stove and you can buy it on Amazon for $10.

https://www.youtube.com/watch?v=9ripTTB6CcU