I wanted to put together my waypoints for the walkabout in North Carolina and found it was so quick and easy that I also did the waypoints for the Chesapeake Bay trip too.
It was easy because I found waypoints from past trips stored in my Garmin Roadtrip software files. I simply had to add a handful of extra markers - Core Sound points for NC, and the Onancock, Watts Island and Chestertown for Chesapeake Bay.
Roadtrip has a very basic US Basemap v2 map, a very rough map at best - it is really designed for planning highway trips. But it is close enough that I can mark a waypoint then adjust latitude and longitude using a paper chart and inputting the information under the "advanced" tab on the new waypoint. Not as simple as simple as Garmin's BlueCharts (which I don't have), but hey, it works.
I'll export the NC waypoints on to my gps tomorrow.