Being that we live in Zihuatanejo......
The Ixtapa RV park is nice, but goes on and off as to allowing pets. If you don't have a tow, you are stuck.
In Zihuatanejo, on Playa la Ropa you have three real choices. El Manglar, which has all the amenities and is nice, La Ropa Trailer Park, up the street from them, with the same, and where we just moved our moho from, Costa Bella.
Costa Bella is directly across the street from El Manglar, and has 3 spaces with all the amenities and a pool. Until three weeks ago when we moved to our house, there hadn't been an available space for the last 10 years. Now there are two.
Acapulco Trailer Park has always been our go to, and from what we are hearing, is still just fine, has all the amenities and security. Ocean on one side and estuary on the other.
Huatulco is gorgeous, but again, it's a parking lot.
Come visit this coast! You will love it.