If your trailer is "sized correctly" for your jeep, I don't think you will have any trouble at all.
I made the drive 2 summers ago and did just fine. Never pulled a rv over a pass like Slumgullion.
Going up from the south, the pavement got a little rough. There were a lot of pavement cracks across the road. Just slowed down to about 20-30 mph so that the me and the rig wasn't being shook up. Enjoyed the ride going up. Lots of curves!
Going down from the pass, I was told some of the steepest grades would be about 10%. I put transmission in first gear and it held the rig very well. Once in awhile it might speed up slightly, slight tap of brakes would correct the speed.
Also, going down, most curves are 20 to 25 mph curves. First gear was perfect. Just take your time.
There is very little traffic and plenty of room for others to pass you.
I arrived in Lake City with no hot brakes.
Would do it again! No problem for me.
My rig weighs right at 19,000lbs.
While in Lake City, ask where to go to see Moose! Should be back up on the mtn.
Hope this is helpful!
Pat
2010 Ford F-350 SRW
2021 Grand Design Reflection 315