Many campgrounds in the west do have at least electrical hookups, including a lot of State parks. National Parks with at least electric in one of their campgrounds include Yellowstone, Grand Teton, Zion, Grand Canyon (South Rim) and Mesa Verde. Other parks have campgrounds nearby with hookups if you don't want to dry camp. Yosemite is one of the most difficult to get in and out of if you camp outside the park, but it is also the most difficult to get sites inside the park, at least in the Valley, where there are no hookups. If you have sufficient battery power, camp conservatively and plan carefully (using hookups and/or travel to recharge batteries between dry camping), you can see just about all our beautiful country without the use of a generator. I seldom use my own, unless my batteries get low from an extended dry outing. It is your choice, and I hope you enjoy your trip out here.