We got our first FW, 2011 Keystone Cougar. I have a bunch of questions: Going to try snow birding, Just too cold in northern Minnesota any more!!! What type of jack do you carry, or use TV jack? Ho...
In my opinion, the very first thing you need address & understand is the TT power distribution system. Find the Converter & share the make & model number with the Forum.
There is no set answer to your question, "how long will my two 12-volt batteries last" But there is hope, if you understand the DC power supply & how to maintain it properly.
Also, a very important factor concerns the type of camping you will be doing. Will you ever be Boondocking ?