We've stopped at Isle Of Avalon Camp Site for the last three years which is short walk in to Glastonbury.
Campsite is 14 miles from m5 motorway from memory, we've done it with a snapped crankshaft no probs
site is flat with electric hookup, clean facilites. Shop onsite which were also doing bacon sandwiches and coffee.
Haven't stayed at Tollgate but we've been to:
Haven Perran sands - nice walk along beach/cliff to town but felt our van attracted too much attention
Goonhavern Perran springs - little bit far out for us having to use bus/taxi into town.
We now use Perranporth touring park, you have to book by post but walking distance to town.
We love perranporth especialy 'Watering Hole' Pub on beach food and live music.
watch out for strong rip currents if surfing/boarding.
We shall arrive Perranporth 17th August via Aylesbury (Wiltshire), Lullworth Cove (Dorset), Brixham (Devon) & Looe (Cornwall); then off to Glastonbury and Slimbridge