There are some really nice RV Resorts in that area, but I wouldn't call them "campgrounds". We have stayed at both of the Outdoor Resort resorts in the Palm Springs area, and highly recommend them. However, not sure if any spaces are available for Jan or Feb stays, as that is their peak season.
There are some regular "campgrounds" in the areas you mentioned and should be listed in either Woodall's or Trailer Life Directory online.... Good Luck... hope you find a place.
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