Katerina,
Thanks for your research on this subject. I agree that it is important for us to know how this will affect us before we make a stance and start righting to our legislators.
I rode my bike down yesterday and enjoyed doing so. However, I do realize that it can affect the environment and so try and take care doing so. Motor vehicles are obviously more harmful. I have also noticed the damadging effect horses have on the steeper trails. I may be willing to give up my right to ride a bike down if it keeps horses and motorcycles from damadging the trail. I could probably live with a hiking only trail as long as we can still swim and bathe in the creek and hotsprings.
However, it is important that we find out how all these things will be affected. Please continue your research and continue to keep us all posted. Thanks again.