Fiona,
Burrowhayes Farm just outside Porlock is an excellent site. It is at the bottom of Horner Water. Facilities are good and they have stables on site with organised rides from the site.The stables house about 16 horses and the rides last about one hour. Safety hats are provided but i would take wellingtons with you. There is a small shop on site. The Dascombe family have run the site for many years. You will see deer and all sorts of wild life. It is an easy walk into Porlock village. The land is owned by the National Trust but as i said the site has been run for many years by the Dascombe family.
Hamer