I have a similar setup. You can get them here.
In the fall we go to a NF campground during grouse hunting season. Usually stay for approx. a month. The panel will keep the batteries charged without running the generator for the first couple weeks. Depending on the amount of sunshine we get. Then it starts getting colder and the sun is rapidly lowering the arc, so we end up needing the generator occasionally to top off the batteries. We try and time it so it happens when we want to run the micro wave or the wife needs the hair dryer.
Prices have come down since i installed mine.
Wish I had one more panel and two more batteries tho.