I like Club de Pesca. Quiet and on the south side of town. Another favorite place is Campo Betel 2, which is not too far from the airport turn off. It was a former RV resort, but now a dry camping spot. Beautiful view with a great beach.
Last time I went down, I used the east border gate. Not too much trouble getting through town, but next time I am considering crossing at San Luis and taking highway 2 toll road, which would avoid a lot of Mexicali.