I hear ya, last year I was fishing the section off the highway were the old train bridge is. When two white vans pulled up and unloaded there rafts and hoards of customers. No big deal right... I know that section gets rafters but we all share the river but courtesy goes both ways.
They decide to set up shop right next me, launching there rafts not 5 feet from were I was standing. I could literally poke one in the eye with my fly rod that's how close they were to me.
When I asked if they didn't know what common courtesy was one of raft guides said its private property and they have permission ????
So I called there rafting outfits manager there phone number was on the side of there vans. The owner stated the same thing that he had permission from some Steve guy and not in so many words but F-off.
From my recollection that section was court order to be a public spot but thats besides the point showing a little courtesy goes along way they could have easily launched down stream there plenty of room there but this is the mentality of some of these some raft guides.
Any how I usually avoid the LP just because of the rafters I was soo pissed off that day I was this close to driving to Heber and kicking in door of there shop.
The "Steve" guy is non other than the brother-in-law of the guv of Utah.
(No favoritism there). Get ahold of the USAC- Utah Stream Access Coalition. Google it up. They know where the easements are.