I believe it is from a call center for an RV park. I recently purchased an RV and keep getting calls for a free RV park membership. I just haven't answered the call I'm sure they will call back.
Yes, it is for a campground timeshare. Several years ago we purchased a new travel trailer and attended one of the presentations that was offered at Cherry Valley. We did not purchase so they called again, leaving a message, inviting us for a four day three night stay at one of their other resorts.