How to get rested XP

11.2s 111.1w in the Silvertine Lodes zone is the location.

It's in the goblin camp, you get there when you go from the nearby dwarfen camp (don't remember it's name, something with deep i think) down and at the bottom of the way is left a way further down to the goblin camp and right is a way through the rocks to the other crystals. Take the left path and try to get to the far right side of the goblin camp. There is a shortcut through the rocks on the right side of the way to the camp (There is also a quest-dwarf there).

As already stated, you can buy a mount from the Iron Garrison Miners if you build enough rep; they have fast mounts that require kindred status, and slower mounts that don't. (Not sure what level of reputation they require.)

There's also an Adventure Pack that comes with a fast goat mount, less hardy than the other mounts but still quite good otherwise -- but I'm not sure if that's still available.