And this year's trip for me lasted from mid-April until after mid-October. Even so, with my three propane tanks and the Oliver's solar power, I haven't needed a generator. Or maybe I should say ...
I haven't needed a generator YET... but I am still thinking about it because I prefer to boondock or camp off-grid, and I've found that sites aren't always solar-friendly (in the forest, trees can interfere with solar), plus the fact that weather can interfere. My batteries ran very low, ONCE, and it was not fun. Then, I was given a used generator by a friend, and it might work for a trickle charge (it's undersized), but I have been slow to figure it out (testing). OTT is trying to help me with guidance (I have had too many balls in the air to tackle the testing yet.) Generators weigh a lot, imo.