Glad you got your battery problem sorted out skeet, do you have an on board charger? Well if you can swing it get one, best investment I made in a long time. Got my first one about 12 years ago, not a real fancy one, single bank loved it. Two years ago I got a 2 bank one as my first charger crapped out well worth the investment. Now I am so lazy I sometimes forget to even plug it in. Going to make up a jumper connector to my rear battery so if I run the main trolling battery down I can just connect to the rear battery and run off of it. I already have a connector on it and only need makeup a cable. Going to buy a 20' jumper cable from harbor freight, cut the ends off put a anderson power products connector, brand don't really matter, and a female trolling motor connector on the other end.......me thinks that should workout ok.
And what Mike said, I normally only keep 8 or so, and that's plenty.