The roads from Park City, depending on what route you take, are a combination of freeway and good two lane roads. Because the roads are major transportation corridors in the area, every effort is made to keep them clear of snow.
It's impossible to know at this time how much snow there will be at the end of December. Could be none, a little or a lot. That said, unless there's an active snowstorm on your day of travel, you should have no problem driving this route. If it were me, I'd want at least a front wheel or AWD.
Curious..are you planning on using Green River as a base to visit Utah national parks? Hope not. Gren River is an hour from Moab, a couple of hours from Capitol Reef and 4 hours or more from Bryce and Zion. You need to stay at each park to visit them. Additionally, other than Ray's Tavern, there's little in the way of dining options in Green River, and there are just a few lodging options.Edited: 17 August 2016, 01:17
Thank you for your response. Most of the vehicles I looked at for renting are front wheel drive so that will work out fine.
Yes, we were planning on staying in Green River and visiting Capital Reef, Canyonlands, Arches, Goblin Valley, and San Rafael Swell. I read that Green River was a good hub for these areas. We don't have a lot of time in the area and it seemed easier to return to one place each night instead of picking up and moving every day. What do you think?
Also, we will be in the area for New Year's Eve...do you know of any events in Moab or surrounding areas that we could visit?
To visit these places you need to be based in Moab, not Green River. You are setting yourself up for a minimum of a 2 hour round trip commute every day. With shorter hours of daylight, you're reducing the amount of time you'll have in the parks. While a winter storm wouldn't be too likely in the Moab area, they do happen. So you could have a difficult drive back to your accommodation in Green River if there is one. Other than hanging out in your hotel room, there will be very little to do in Green River when the sun goes down. Moab has a large variety of restaurants, etc. and if all else fails a movie theater to kill some evening time. I have no idea about New Years Eve activities in Moab. I spend New Years Eve in SLC.
Our favorite place in Moab is Gonzo Inn. I haven't stayed anywhere else in Moab. Do a search of TA for hotel listings and reviews. You would want to be in the center of town for easy access to restaurants etc.
In the winter, there will probably be only two options in Torrey - the Days Inn and the Broken Spur. You can also search for a broader choice using "hotels near Capitol Reef". There is at least one resort type property between Torrey and Capitol Reef. I don't know if it's a seasonal operation.
Good info from Connie. I would base the time in Moab and Torrey. Both are very small towns, but Torrey has a year round population of less than 200. Not sure of your overall itinerary, but I might try to plan NYE for Park City or even Salt Lake. Between Torrey and Moab, try for Moab.
The issue with snow can be real. But there is no way of knowing until you are in the area. Might not snow the entire time you're in the state. AWD is nice and also try to get a vehicle with winter tires rather than all-season. If it snows heavily it could alter travel plans until roads are clear.