It appears that the OP just wanted to know of any parks available in Spring Hill. The link below from RV Park Reviews.com indicates one park. That doesn't necessarily mean there is only one, but it is the only one reviewed by other campers. From the ratings, which aren't bad, it may be what you're looking for.
http://www.rvparkreviews.com/regions/florida/spring-hillFor more info on what's available in the surrounding area look to the lower left of the review page and you'll find other cities to check out. Just click on them to see what's available.
I'll second Rock Crusher Canyon RV Park up in Crystal River since I've stayed (and will stay again this winter).
2018 Chevy 2500HD Duramax - 2015 Cedar Creek Silverback 29RE
16K Huskey EZ Roller Hitch - EU2000i Honda Generator