Have a group RV caravan next year for 36 days in this area.
Yes I have heard it is a beautiful drive and probably no issues for your Georgetown.
The WagonMaster of our RV group has decided to drive it with cars and not try it with 22 rigs which probably would probably slow things down a bit as you have to think about others on the road.
If I was doing it on my own I would not hesitate driving my Georgetown and toad. I have many miles hill climbing with mine.
You may not so keep reading what others suggest.
I just Google Mapped it between the two points and looked at the roadway.
I say no problems if you are used to driving on 2 lane routes. Yes it has some curves and hills but nothing I see that the Georgetown can't handle. It all depends on the experience of the driver.