Anywhere that will take dogs and has an area for the dogs to run. Also has to have quiet secluded areas or big enough to set up not to close to others, as the dogs are excitable with others. Facilities don't have to be brilliant.
I agree with feeblecat Culzean Castle is a great site with fantastic sunsets over Arran,Walled Garden campsite near Maybole is another good site in that area.Its worth going a bit further south and visiting Dumfries and Galloway;its got some really good campsites and lovely beaches.
Mick
Don't forget to leave a review of the campsites you have visited this year or last!
you also have heads of ayr campsite, has clubhouse and eatery and a farm park. right on the coast so views to die for but 1st thing the wind hits will be your tent