The UTV Jam in Marysvale last year went up in participation by over 30%...again, just saying.  The meals were prepared by mostly non profit entities and as you say the shirts were if you wanted them, you were not required to buy them.  And we sure had one heck of a great time.

ATVs are as welcome as the side by sides. The rides are similar to those from the Rocky Mountain ATV Jamboree since they used some of the same routes for their planning and permitting. They have to stick mostly to the wider trails for the UTVs but also have a couple limited to ATVs and RZR's that are 50" or under. They have a few unique to the event also. they are all on the Paiute Trails surrounding Marysvale.

The rides are typical for most Jamboree's, a little on the slow side but it's more about the socializing during the event and while on the rides than the actual ride or it's route. Some of the best friends I have and who are now friends for life I meet at a Utah Jamboree.