Sites with "off main road" cycle routes nearby

For the Camel Trail, starting at Padstow try the Dennis Cove non CC site.

For the New Forest, Black Knowl is excellent.

Apologies Dennis Cove had already been suggested also try the long bracing sea front at Sandilands near the CC Sutton on Sea site, not too far for you. 

There is the coast to coast cycle route in West Cornwall.  I think it stretches from near Portreath in the north to Devoran in the south.  There are cycle hire shops for those who don't want to take their own equipment.  Globe Vale (just outside Redruth) is situated fairly close to the route, especially if you have your own equipment.  If your hiring you will have to drive to the hire shop.

Hope this helps.  Globe Vale is a particularly favourite site of ours (as I'm sure some will know ).

David 

Another vote for the Camel Trail.  Right next to a great little CL on the banks of the River Camel. 

Ferry Meadows miles of cycle routes including towpath and country also all the way to the city centre with no traffic

There is a nice CL, The Station 1251, at Attlebridge nr Norwich that is situated alongside The Marriotts Way. Turn right and you can cycle into Norwich, turn left and you can cycle to Whitwell station and beyond. The lanes around the site are relatively quiet too.

Here's part of our outfit on the long promenade ride from Sandilands to Mablethorpe (Sutton on Sea CC.) 

Edinburgh site all the way into Leith or the other way along the Forth.

Carsington Water, all the way round the reservoir.

Whitewater at Middlesbourgh, straight out the site along the river cycle for miles either way

Southport. Cycle lane designated along the sea front towards Preston and t'other way the coast road goes slightly away from the sea but has a designated cycle lane running parallel wih it

doent National Cycle Route 1 wend its way up past you....we used it when in Norfolk and Lincoln last year and managed plenty of 'very quiet' road cycling, if not specifically traffic free....it really was great there...

much further south, Brighton is on NCR 2 which goes all along the south coast, mainly along promenades of the various seaside towns with dedicated tracks....another pleasant area for cycling..