That is a great looking site, I'll give it a try and be sure to remember it for telling others. I love how you can pick a point and look for nearby campsites.

Normally I plan my tour routes offline using downloaded OSM maps (something like velomap.org) in QMapshack. One thing I like doing on there is having POIs I can turn on/off with things like UNESCO World Heritage Sites, National Trust Sites, World Wonders from the Civilization games etc. so I can tweak my route to connect a few of those dots if it goes near them.