I know some place to Teignbridge, but I did not go to each camps, so I do not have a specific opinion to give you !!
Here are the names of the camps I know: I Babeny Farm Stables - Finlake Riding Centre - Hayes Farm Riding Stables - Oakwood Farm Stud & Riding Centre - Lemonford Caravan Park - Cholwell Farm and Riding Stables - Sedgewell Farm - Shilstone Rocks Riding Centre - The Horse - Leonard Coombe.
The first three are really good. Good luck for your researches!
I hope this helps, bye.