The first week of January this year, my wife and I stayed at "Hidden Beaches" resort in Blythe. It's about 4-5 miles north of town (near the fairgrounds where the Hobo Rally was) on the river. It is like a trip to 1960- kind of old and funky- and for that I really liked it. My wife was less happy, mostly 'cuz the bathrooms were pretty rustic. I'd go back, but my wife would strongly suggest the KOA, also on the river right by where the I-10 crosses to AZ. I think it is the Riviera mentioned above, and when we were there the KOA signs were still up. It was bigger, more crowded, more commercial, and I guess nicer.