It appears you're from Colorado Springs. I don't think you'd enjoy ElPaso and there really are no good RV parks there and the traffic is horrendous.
If you want to be in that area, consider Deming, New Mexico or Las Cruces, NM. None will be what you might hope for as 'warm'. You're still at higher elevation around those areas.
Consider Tucson if you want warmer and it has lots of wonderful things to do.
Deming - you'd be near City of Rocks and Rockhound State Parks for some interesting terrain to explore. I believe each has electric hookups which you'll need because it could be cold/windy in that whole area. You could also tour Silver City area. There are many RV parks in Deming along with restaurants. The museum is awesome - a little bit of everything and well organized. It's not a fancy little town.
Las Cruces, NM is a bigger city than Deming if that's what you like. Likewise, much to do in the area for drives. Again, it could be cold & windy there. Depends when you're planning this trip. mid-Dec/Jan - mid-Feb are the colder times but then, you may luck out.
Elephant Butte was mentioned and that could be another possibility although it's a small town. I think spending two weeks there would be difficult unless you want to fish.
All of the above would have about the same weather.
To find RV parks in these areas that might appeal to you, look up the town or nearby towns on RV Parks Review. Also, there are state parks in all these areas so you may just want to move around to check out the different places if you enjoy state park surroundings (like we do). Good luck with your choice!