With out really knowing your camping style or durations it's pretty hard to give meaningful advice.
If you're a weekend camper the chances are you wont need any recharging while camping at all or if only stay in one place for two days you still won't need solar or generator
. Your tow vehicle should take care of it.
The best way to extend your battery
power is reduce you battery needs. Change lights
to LED is easiest and simplest way to increase battery charge life.
I've been doing this for over 10 years. The first couple of years camping was week-end and a week or two in the summer. Never had to worry about recharging. After retirement we camp for about 3 months at a time, last winter was 40 days in one spot, then I needed the solar.