We have an 85 watt panel and it has worked okay with a two 6 volt 235 amp deep cells. We are good for two days in the winter without starting up the truck. Our camper has LED's because we use the lights in the winter quite a lot.
Next on our list is a 140 watt panel, our controller is good to about 25 watts. My recommendation is to bite the bullet and go with a bigger panel and a bigger controller.
The thing I really like about solar is that its always trying to work, if there is enough light its working. A generator is noisy, dirty, takes a lot of valuable time and work. Solar is the best.
Good Luck!