Been to sand mountain, and St Anthony, neat places to ride, cool to see the big dunes and my guess Glamis and Dunmont are similar. But you just can't beat the variety of riding area we have on the Oregon coast that these other places don't have and it's pretty much 12 months of riding if you want which is a bonus. I'm more of a fair weather rider anymore but I've been out in a tee shirt in Jan-Feb riding at the coast. It's a great place.
You don't need any spare parts if you come to Oregon, Tony has the parts for you just make sure you are riding with him. Haha