I have a couple of regular one and two day tour choices just off, and on, Cape Cod. One is riding across the Bourne Bridge to "The Cape" There are plenty of paved trail miles, and the roads are bike friendly, if that's your preference. There are many available places to stay. From five star accomodations to commando camping, and everything in between.
Once on the cape side of the bridge, there are so many riding choices. Hug Buzzards Bay to Woods Hole and Falmouth, or head north toward Wellfleet and Provincetown. Another good choice is to hang around Dennis and the Yarmouth area.
An alternative to crossing the Bridges is a great ride to the Plymouth area. Plymouth is very close the Myles Standish State Forrest, which has miles of roads and a half dozen ponds that are open to camping at a reasonable rate. (If you choose to check in. Budget cuts, if you know what I'm insinuating ).

I very often have the roads to myself riding from New Bedford, Ma. to Buzzards Bay (Bourne Bridge) and/or to Carver (Myles Standish). Naturally once you get to the touristy areas, a rider has to share.
This message was edited by capejohn on 2-8-07 @ 7:43 AM