We’ve been up and down 550 a lot, towing, and it’s really not too bad. Everyone goes slow enough that there’s not the “white knuckle” experience you would think. An alternative that we’ve done from Fruita (be sure to visit the Colorado Nat’l Monument there) is to head towards Ridgway on 50, which turns into 550. In Ridgway, turn right towards Telluride so that you avoid the Million Dollar Highway part of 550 (Ouray to Silverton). Go past Telluride, through Rico and you’ll be able to pick up 145 south to Cortez. We are usually heading to Durango so we bypass Cortez. It’s a scenic drive without the mountain passes that are on 550. Mike