The only friendly is in the title. If you're under 75, you'll be out of place. If you have a dog, you won't be able to walk him/her in the park. There is a small playground, 10x5, near the Office, but you'll have to carry your dog there.
You should know that the trailer park is in a bad part of town, surrounded by empty lots, broken cars and homeless.
Once you pay your $100 deposit, don't think you can change your dates. That deposit is lost and they'll refuse to apply it to any days you spend there.
There are only about15-20 spots for transients. And you're under the airport flight path, so why bother?