Arizona for our first winter south suggestions please

Four months backed up to the Colorado a River south of Lake Havasu. Little cooler but I would go nuts staying in the desert that long or an encampment in one of the big cities. Have taken my Harley, not lots of traffic to contend with. Taken my Polaris RZR for desert riding right across highway 95. Now I have an inflatable boat with 20 hp motor(easy to take down in back of truck) to cruise and float the river. Best of all worlds were we go.