Battery or no Battery?

I started to think about some weight savings ideas for the camper.  Right now I have 2 batteries and 2 20lb propane tanks on the front.  If I was going to be camping at a campsite that had full hookups do I really need to carry all those items?  If I pull off both batteries and the propane would there be anything that would not work?

A small battery would probably die in a very few seconds. IMO enough to go from 60 mph to 56 mph, then momentiom takes effect.
Having a trailer break away is something I never want to go through again. I had a simple utility trailer get loose and at 30mph it went almost a block and a half before it was stopped by a tree. 300 lb trailer compared to a 3000 lb trailer, you do the math. Thankfully only the tree was damaged/ hurt.
If your wondering how this happened, just say always do your own hookup or check it if someone else does it right who's helping you. Found out after the person who hooked up the trailer had no ideal how to do it right, but said he did. My bad!

I have two batteries in parallel and I'm glad for them as I can go twice as long in dry camp than I could have otherwise.  I can't imagine going without any battery back-up.  

My only thought is that we sometimes go to spots like hoosier national that on the north face only have 4 electric sites, if you leave the stock one gas cylinder and a single battery you will have gas heat, gas hot water, lights, no t.v. or a/c or microwave but stove, lights for about 3 days. then maybe an electric site will open. Donna and I like the small 1500 watt electric heater if we have an electric site, its much quieter than the gas furnace and keeps the pod toasty warm. My guess is that by downsizing to the stock configuration you are trimming 91 lbs, you could save more than 200lbs by not filling the fresh water tank until you get to the camp sight. Just a thought. Anyway its all good in the Pod.