First the solar panel for $97 is not what your looking for. For that price it's a 15 watt panel. You need 80 to 100 watts of solar to charge deep cycle batteries. What you look for is amp hours (a 12volt battery puts out 55 amp hours)
This is what I did, I installed two 6volt batteries ($150 each/interstate brand) wired in series to get 12volts. Because 6volt batteries have bigger plates in the battery, I got 235 amp hours. This will last for me about 4 days of dry-camping. I also installed a 33 watt solar panel, this low wattage solar panel is a battery maintainer and It doesn't recharge a dead battery (but it does help) in a day (more likely it would take a couple of weeks)
I this point for you, I would spend the money on 2 6volt high quality batteries. Always replace batteries in pairs ( same date) or they wouldn't work well together.
2006 22ft towlite (replaces 97 21TL)
2006 Toyota tacoma pre-runner 4.0 L V-6 quad cab
w/ 98 chevy Powervision towing mirrors