Road Advice Please

dinglebin

Hi, As a new caravanner I'm shortly due to venture onto previously unchartered roads and would like some advice / suggestions.  I'm ok finding a suitable route to Longleat but when we leave there and head over to Bude I'm not sure if the van will be suitable
for a few of the suggested routes.  Does anyone know if the B3092 which links Frome with the A303 is suitable?  Also, is the A3079 between the A30 and A39 suitable for towing?  Thanks