The following is a link to an article about finding places to camp for free and some of the resources available to help with the task. Seems to me it will be very helpful to people starting out or making a summertime test trip. There is probably something useful for most other people as well. It contains links to online resources as well as lots of suggestions.
Sleep anywhere in a van? Think again - The Boston Globe
MG
Sleep anywhere in a van? Think again - The Boston Globe
MG