If you're talking about now or fairly soon, most of the snowbirds have started north and the shows are all over so it's not hard to find a place. Three large BLM areas are south of town, two on the west side of US 95 and one on the east side. Our annual RV Forum is at the second area on the south west, at section/road 541 if you want to see where we camp. There is a BLM entry fee at those three areas. Also there are some areas north of town that have no fee. I shouldn't think you'd have any problem at all finding a place where you can run a generator. There are hundreds of acres of open land there and camping is available in just about any direction. FYI, Quartzsite has an east entrance and a west entrance off I-10 and the town center is half way between them where US 95 intersects I-10. Fuel is available at both ends. There are two fairly good grocery stores at the northeast side of town on Main Street. Blythe has a large Albertson's.
ArdraF