Snowbirders set off as early as October for the snowbirding climates of Southern Arizona, and especially the popular areas around Phoenix, Casa Grande, Tucson, and for those who eschew these more populated areas, along the Colorado River. Though there are several nice RV resorts, county parks, and an Indian Reservation on the California side, the Arizona side is more popular, more developed–and more crowded.
The main drawback of the California side is that you can only cross the Colorado River at Laughlin and Needles in the north and at Parker in the south to access what locals call the Arizona’s West Coast that stretches along three-quarters of the Arizona border, but for RVers more realistically from Davis Dam just above Bullhead City south to Parker. You cannot cross the river over Parker Dam, as RVs are not allowed, though the town of Parker is only 15 miles to the south.
Known as the RVers Las Vegas, Laughlin is on the Nevada side of the river across from Bullhead City. Several of the casinos provide camping for RVers and across the bridge from Laughlin and within walking distance, Davis County Park has riverside dry-camping sites, partial hookups, and a full hook-up section on a bluff with super night views across the river to the lights of Laughlin. Bullhead City also has several RV resorts.
Continuing south, Needles also has several RV resorts as well as Moabi Regional Park with full hook-up sites and 2 1/2 miles of partial and no hook-up river side camping as well as monthly snowbird rates.
The 40-mile stretch from LHC south to Parker is called the Parker Strip and is the most popular area along the river for RVers. LHC itself has several RV Resorts in town as well as Lake Havasu State Park campground just a mile from London Bridge and shopping, restaurants, and services, yet offers a very camping experience with large spaces, lots of trees and shrubs, birds, and wildlife, and it is on the river–but no hook-ups as yet, though plans are in the works.
South of LHC on the east side of the highway in the area known as Standard Wash and extending south nearly to Parker are several areas where you can boondock well off the highway. There is no camping or boondocking on the River side of the highway. One of my favorite boondocking spots is back a dirt road just opposite the View Point pull off just below mile marker 170. About three-quarters of a mile off the highway, a level hard-packed area provides a good campsite with a view across the desert to the north. Just past the campsite, the road dips into a wash with soft sand, so stay out of there unless you have a 4WD toad, but there is plenty of hiking and exploring up the canyon and into the many side canyons.
Below LHC, three more state parks–Cattail Cove, River Island, and Buckskin Mountain–provide both no hook-up as well as full hook-up campsites and have river access for canoes and kayaks as well as a boat launch. The state parks have a two-week maximum stay per month though Cattail has a few longer term spaces. Between Parker Dam and Parker, La Paz County Park campground has full hook-up to no hook-up sites on the river. If your cross the river at parker and turn north along the river there are a couple primitive county parks on the river also and there is dry camping on the Colorado River Indian Tribes (CRIT) Reserviation northwest of Earp. Tribal information, a museum, and camping information is available from the tribal office in Parker at 26600 Mohave Road. For a list of Parker area RV campgrounds go here.