I was there mid-week in 2010. It was a lot of fun to be centrally located, but really they wanted $150 per NIGHT - don't know if it is worth that much. However the RV owner did not mind paying so that is where we stayed. Because we bought the reservations late, we stayed in the dry camping for a couple of days, then moved to Presidents area, then back to dry camping for the last few days of the event. It was going to be windy on Sunday, so we left around noon on Saturday. Had a great time, and spent Saturday night in Laughlin NV, before going home on Sunday.
You do get a free "Dump" in the Presidents compound. Basically the honey wagons come by early - around 8 am. You leave a ticket on your windshield, and unlock the sewer compartment. They will dump it for you, and close the compartment. I think they had water hookups, and 30 amp electric.
Other locations have a generator to supply 30 or 20 amp power to the sites. It is a quiet generator - but I would not want to camp near it. It is diesel. . . And you would need to get the honey wagon to stop by your site too!
What I did in 92 and 93 is drive to a dump station in my camper. I drove it almost daily to go to the store, or sightseeing. In 2000, my current RV has 42 grey and 59 black tank, so I did not need to dump in a week. I stopped in Laughlin to dump and take on a little water and was home the next night. I had a dune buggy toad, and that was fun to take out sightseeing!
Did you go this year?
Have fun!
Fred.