If you will need to use your microwave or air conditioner at all, start with a generator. If you plan to camp at altitude, the 2000 probably won't fire the air con even with a soft start kit. My 3000 watt Yamaha barely got the AC going at 5000 feet, blinking its overload light once the compressor kicked on.
I do agree the best answer assuming you can afford it is both. I'll be having solar installed next year. Besides not having to plug the trailer in every few weeks to top off the batteries, solar will give me a few extra days of electricity while boondocking. If I don't have to use the micro or air con, solar will give me quiet power all weekend.