@travelhacker It's just the two of us for skiing so a studio is fine but 1 bdrm is better.
Good to know about April conditions. I was told something similar about Utah/Alta/Sunbird but not sure about Park City because it is lower elevation.)
Which Hyatts do you recommend?
When I lived in Utah, I loved late season Park City (Alta / Snowbird were definitely better in the late season). However, Deer Valley never seemed to stay open past the first week in April, and once Vail Resorts bought Park City they started closing after the first week in April too. It's a shame, I have fond memories of skiing in t shirts on those last few days of the season.
Back to your question:
You'll love any Hyatt that you can book in Colorado. Because of the Hyatt Internal System, I think it's probably pretty hard to book anything via interval except for weeks 48-50, and 13-15. If all you need is a studio it's even harder, because I've never seen a studio unit at any Hyatt available (via interval). It's probably worth a shot to put it in an ongoing request and see if you can get something.
Just a quick recap on the Hyatts in Colorado:
1) Hyatt Main Street Station (HMS) in Breckenridge. While it's not on mountain (like GP7 or GP8), it's pretty dang close. You really only need to walk about 100 yards or so to get to the main base area. Rooms are about 1300 square feet and very nice. Studios are probably around 500 square feet.
2) Hyatt Mountain Lodge (HBK) in Beaver Creek. It's right across the street from the main village and during peak ski season you can technically pop into your skis and ski down to a lift, you can also ski back using a trail. Units are a little smaller (about 900 - 100 square feet). Surprisingly the studios are about 600 square feet. I really like this place, but wish the units were just a hair larger.
3) Hyatt Residence Club at Park Hyatt Beaver Creek (HRP). It's got the best location in all of Beaver Creek. It's part of the Park Hyatt that backs to the main lifts on the mountain. It's incredibly high end -- I don't think there's an equivalent in the Vistana system. 2 bedroom units are 1500-1700 square feet, and three bedroom units are 2100-2200 square feet.
4) Hyatt Grand Aspen (HYA). It's a great location in Aspen (right in downtown and a couple of blocks to the gondola) and very high end. There's just a couple of 2 bedroom units that are 1200 square feet, and most are between 1400-1800. If you're a good skiier, I think it would be a lot of fun to exchange into a 2 bedroom at this location for week 13 or 14 and ski at Ajax (nearly all black runs).
If you like skiing in Colorado, you may consider purchasing a Hyatt week resale. For example, a 2200 point week in Key West goes for around 6-9K, and that would get you 3 weeks in studio units at HYA, HMS, and HBK (no studios at HRP) during peak season.