Hi Dale,
As Richard mentioned. I'm a North Dorset resident too, actually living in Gillingham. I belong to two clubs, Shepton Mallet Drifters and Yeovil Model Warships, they are about the nearset clubs to our area. Drifters meet at Collet Park, on the first Sunday of every month, the Yeovil Warships at Halfway House, on the A37 between Yeovil and Ilchester, with access to the water every day, any time.
Don't be put off by the name, we cater for all types of boat except ic. If you need any more information, don't be afraid to contact me via PM (personal message) Hope this helps.
Danny