Good lord, we are going to bury this gal in stuff that seems simple to us hairy men, that burdens the fairer sex.
a pair of GC-2 batteries has a very small foot print. If your tongue weight is too heavy, store some heavy junk somewhere beyond the axles, to the rear of your trailer, to get things balanced weight wise, properly.
You don't have to be a load master, but you do have to follow instructions with your trailer, the axle manufacturers suggestions, etc. You can't just store stuff whereever it's convenient on a Travel Trailer, it does take some discipline to stay within limits.