Of course, only you can decide if YOU need a generator, but I spend a lot of time boondocking, and would never be without one. However, I don't have solar, and even if I did, most of my camping is under trees that would interfere with solar charging.
I have to have it for battery charging (about every 3 or 4 days) and A/C in the summer (I live in the south). DW likes it for the microwave and blow drier, though those are non-essentials. Remember, if you are boondocking without a generator, you will only have 120v from an inverter, and that CAN need a very large battery bank if you use much 120v power at all.