Agree that Hacienda is a very nice RV park, but we prefer the big shade trees, grass between sites, private shower/bathrooms, and walking distance to a grocery store at Sunny Acres. It's hidden behind an RV storage lot and next door to a mobile home park, but it is nicer inside than its surroundings. In mid-winter, when we are there, we don't want to pay for a swimming pool that we can't use anyway.
The choice really depends on how long you will be staying in Las Cruces and how many of the amenities you will use. Take a look on-line at the amenities and photos of each park before you decide.
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