I guess you can adjust the surge brake so it does not do much and yes disk brakes will take more heat but no way would I have a surge brake dolly in the mountains. I would go electric and pull the fuse in the front run box of your Monaco so the brake lights and the electric brakes on a dolly do not come on when using just the exhaust brake.
For those that want to post you should have your brake lights on when using the exhaust brake......do the brake lights come on when you take your foot off the gas pedal in a gasser? This is much the same as using the exhaust brake to not let your speed increase coming down a mountain. If you are coming to a stop you will be using your brakes and the brake lights will be on.
