I have not stayed in Yuma myself, but had pretty good luck in my last rip by searching google for "RV Park.. Whatever City" Most have websites and you get a reasonable idea of the quality of the park.. MOST of the time.
As you caqn see from This Image
(Click the Satelite option on the map) wherever you stay, the scenery is not going to be all that spectacular.
There just plain isn't anything out there but dirt.
Good you are going in Feb instead of the summer, but check your ressies carefully. Yuma is a HUGE spot for the snowbirds!