Posted: 13/03/2014 at 21:25
Best route will be M25, M3, A31, A35 to Dorchester and then A354 to Weymouth. It'll be much faster than going along the south coast.
Lots of places to stay. There are a few holiday parks in Preston which are about a mile or so from the transition in Lodmoor. Lots of B&B's in weymouth itself which again aren't that far away. really depends on what you want.