191 from Rock Springs Wy to West Yellowstone Mt.

Is this a Big Rig friendly hwy? I am a 38'motorhome DP towing a 20' enclosed trailer loaded with jeep and two HD electraglides. Anything I should be worried about as in steep grades/decents, narrow roads, switchback curves???? anything at all to worry about on this route??? any info would greatly be appreciated. We will be traveling this way in 3 weeks. Thanks for the help !!!!