The Plaza Del Sol Hotel/Casino is often a host hotel and offers a shooters rate - and it's a nice casino with several eating options, but the problem is that you usually have to park WAY out in the parking lot and haul your gear a long ways to get to your room. When I haven't been RV'ing I've stayed at several of the motels on Tucson Blvd near the airport. Never had a problem at Country Inns and Suites or Hampton Inn and both usually offer a shooter's rate. Many more options like Holiday Inn Express and La Quinta, etc. in the same area.
But, Karla is right. Your gun should stay with you no matter where you go. NEVER leave it in the car. And like she said, when I've stayed at motels instead of RV'ing, often I've left my gun with a friend who was RV'ing. Tucson Trap & Skeet Club does not have lockers, so keep your gun with you at all times or leave it overnight with a friend RV'ing on the gun club grounds. Like the RV'ers like to say - who's going to break into RV's at the gun club when they know EVERYONE HAS A GUN?
But, don't let fear scare you away from Tucson. It's a great, very well run shoot and a nice change of weather in February for many shooters that are stuck in colder climates for most of the winter.