dodge guy wrote:
You will have mountain passes anywhere you go. Personally I would go into the park through RedLodge and over the Bear Tooth Highway. Amazing scenery and takes through Cooke City. For me this is a great way to come into the park!
While I agree with much of this, I would not want to take 212 (bear tooth highway) from Laurel, towing a heavy trailer. That road uses many switch backs, tight turns, followed by steep climbs. Again, I have ridden this highway on a motorcycle, great fun. Stayed at Red Lodge KOA (nice place) I still think best option is to enter from Cody, and a no brainer, if you are already at Ten Sleep.
These areas...weather, ya never know? You take your chances!
I towed enclosed snowmobile trailers 6 times from Bozeman to West Yellowstone. Often a challenge, sometimes a wait, while plows were doing their job. This was in Winter though!
I motorcycled through Glacier Park, late July, right after they got 14"s of snow overnight. While I was riding up highway to the sun, skiers were skiing down next to the road.
Jerry