My mountain flying has been Colorado/Utah and Scotland. The two are almost completely different. Sunny slope is less important in Scotland. The Colorado Flight Centre at Grand Junction offers a Mountain and Back Country Flying course. (I've not done it). From the weather I've encountered in that area over many visits, I can't see much practical flying that would be usefull in Scotland. And vice-versa if you did a course in Scotland. Understanding the local weather is one of the most important things.
Taking off at 7600' in a Pa28-161 is no big deal from an 11,000' runway, but you have to watch your AUW and climb rate with regard to where you go. A previous FBO had no objections to me flying into the Gray and Desolation Canyons - but I picked the weather carefully to do so, and only with the Pa28-181.