While there are probably some variation in grades along the route, 2300ft in 10 miles is only around an average of 4% downgrade. That's shouldn't be an issue for a rig in decent condition.
1. Downshift as soon as you see a steep downgrade and try to keep the speed down. Once it gets to fast, it's harder to slow it back down.
2. If downshifting isn't enough, short hard braking (not locking them up) then let the speed slowly creep back up letting the brakes cool between uses.
If you get to a flat section where you can safely pull off part way down, consider stopping and letting everything cool off if you think you have been pushing the brakes hard.
Does your MH have a tow/haul mode and do you turn it on? With a MH, it should always be on. It will do a lot of this for you. First time you tap the brakes, it will downshift.