I plan out my route for a comfortable division of the days needed to arrive, pick a spot along the way and reserve a site.
I allow time to pull in early, before suppertime, and make it part of the holiday. An evening to relax, chill a bit and enjoy the journey. I get at minimum a spot with 30A electrical so I can run the AC. For one night, setup is minimal, and I can use the onboard water and holding tanks. If it's level enough, I sometimes won't even unhitch.
No stress, no rush, no worries about being chased out of WallyWorld parking lot.
I only use the genny if I absolutely have to. This past summer, I didn't even bring it. I had reservations at 4 locations, all with full hookups.