Same camper, but with new batteries!
Batteries seemed fine when we headed out to Alaska at the end of May. Worked fine until mid July when they just up and wouldn't hold a charge.
I think they didn't like powering the inverter the 2 or 3 times we used it.
Replaced with a pair of Group 27 from Auto Zone in Fairbanks.
Had no concerns after that about having enough power. We were driving most days so batteries were charged back up, and also got charged by campsite power when we had it.
Auto zone has a tester that will tell how they are holding charge, both mine were not doing well. Charge up the batteries and take them in for testing. Only problem is you need to take them into the store. No fun wrestling those weights out and back in.
Brian