If it's a state park, it may be policy because of some legislation that was passed...won't find that at a private RV park.
That said, ticks have been bad so far this year in the Mark Twain Nat Forest area. If you venture off of the mowed areas into the tall grass or forest, be careful. I've known people who work outside to wear a flea and tick collar around their ankles on their boots.
Success is hiring someone to mow your lawn so you can play golf for exercise.
2018 GMC 2500 Duramax Denali
2018 Coachman Freedom Express 287BHDS
60+ campgrounds/400+ nights, 20K+ Miles towing since 2015