There is camping allowed at the track, but it was pretty spendy. If you look at the Miller Motosports Park website they have information on RV parking. I don't think they changed anything for this race. What a lot of people don't know, is that right next to the Miller Motorsports Park is another facility known as the Deseret Peak Complex. It is a County owned facility, and there is a MX track there as well. This weekend there was a race being hosted at that facility as part of the Rocky Mountain MX Series which is the biggest local MX series in Utah. It was within walking distance (albeit...a good jaunt) from the National track and there were as many or more RV's and rigs at the track, as there were at the National. It was done intentionally, so people could come and race the local series, then walk over and watch the National. They also split their race weekend to Friday/Sunday so Saturday was open for everyone to go the National....and they had an Amateur open practice at the National track. The camping would have been a lot cheaper at the local race, and then walk to the National track.