Thanks everyone for all of your replies and suggestions.
I will likely do what RVGeek suggested and purchase 2 new group 27 batteries from Walmart or BJ's and be done with things.
I am waiting to receive my battery tester from Amazon just to see what the individual cells read before I buy the new batteries.
Unfortunately, tester not scheduled to arrive until early May.
Doesn't really matter though, nowhere to go!
I'll report my findings once the tester arrives.