I live in Las Vegas and am an avid hiker & kayaker. My GF and other friends are into mountain bikes; my buddy and his family are into ATVs. I have a lot of experience with outdoor activities and road trips in the SW, and I think that the previous posts all had very good advice.
Moab is a trip all by itself. You can kayak one day, bike the next, raft the day after that and then do some of the hiking in the area. Plus the town itself has lots of festivals (in the spring and summer months especially) and they cater to the eco-tourists pretty well. It’s a fun and relaxing place and really deserves it’s own trip. Also, it’s like 6-7 hours away from Vegas, so you’d spend a good chunk of two days just getting there and back.
Zion is awesome and you can hit the high points (Angel’s Landing, the Narrows, etc.) in a day or two easily. If it was summer you could prolly get in some rock climbing as well, but by November the days will be shorter and it will be difficult to fit that in without feeling rushed (and you should NEVER be rushed at any of these parks (well, unless there’s a flash flood and then you should feel VERY rushed)). If you have the time, the north part of the park has some excellent hiking and camping; this is above and away from the scenic valley, but is still amazing land.
I recommend 2-3 nights out on the trails in Bryce if you can afford the time. Queen’s Garden, the Fairy Castle, the Hat Shop, etc. are all awesome to see, especially from in amidst and right next to. It’s a beautiful, bizarre, surreal place made even more fantastic by the fact that you’re standing in the middle of it all. You’ll know what I mean when you get there, maybe.
The North Rim has some excellent day hiking but isn’t going to occupy a full day unless you plan on hiking down into the GC.
The South Rim is more interesting, but as has been noted above, is a far drive in the opposite direction of the first four places.
I hope y’all have a terrific time on this trip. Stay safe, stay hydrated and understand that the sun sets quickly out here during the late fall and winter.
A final note: no one has mentioned it yet, and mostly no one will because it’s still not widely known and it’s still difficult to get to, but if ever wanna head this way again to go hiking and camping, hit me up about Supai. It takes more planning and effort than most outdoor trips, but it’s worth it. 