No. This site is only for locations on private property - ones that are privately owned or controlled by the host members who list them.
Feel free to share that type of information as an aside on your profile page. You can also mention it in our Facebook Group, our RVillage group, and other social media pages we manage. Or you can offer it on other websites intended for sharing such discoveries like overnightrvparking.com or the daysenddirectory.