I can highly reccomend ferndown farm: http://www.dorsetescape.com/
They’ve a converted barn which is very cool; open plan, ideal for a party with an enormous log burner and room for 10 at a squeeze, and a cottage with a warren of separate rooms which is more cosy but sleeps the same.
David who owns the place is a real character who’s super helpful. Let him know that Tim Armstrong sent you and he’ll see you right.
Also, its slap bang in the middle (i.e one of the bridleways runs through it) of the 35 miler that was featured in STW a few issues ago.
We’ve hiired the cottage and barn a few times for various family gatherings and couldn’t reccomend them highly enough. We’ve had fantastic trips on every occasion.
Tim aka CSFL