Sorry, late to the party, but I have two Optima yellow topsin my TJ. I also have two yellow tops in my Ram. I have always ran dual batteries in all of my adventure rigs.
I have a write up in the How-tos'
https://wranglertjforum.com/threads/how-to-install-dual-batteries-in-your-jeep-wrangler-tj.7166/
Feel free to ask any questions.
Nice clean install, was there ever a point in your adventures where you were like "I am so glad I have dual batteries"
I found a really nice dual battery system, but I'm on the fence about it. I carry one of those little Litho battery jump packs. Here's what I run at camp sometimes:
1000 watt inverter
4 LED cube lights for perimeter lighting (when setting up or sporadically throughout the night for bathroom breaks, or when cooking)
LED strips for RTT lighting
The inverter is used to run a laptop, tablet for navigation, tent heater (for the kids), various photographic gadgets my son brings. I say this one begrudgingly, Keurig machine, happy wife happy life. And a few other small charging devices here and there.
On the other hand, I've got a distribution block and ground bus for all my accessories ran from the positive on a fused link to get all those connections off the battery.( similar to sPod at a fraction of the cost) Maybe it'll last longer and it looks neater who knows.