I'm not a geo owner, so I can't comment on the mountains from experience, but how is the mountain trip currently? If it sucks already you can probably expect it to get worse, but I doubt it will be all that much worse.
Also, unless the machine shop has experience with cam regrinds, I would stick with the place that does all the xfi cams for everybody for 50 bucks or whatever, because I've heard good things and it's a great deal.
