Just tried out the new trip planner. Couldn't find a way to save the trip for later on their site. As a test I did a trip plan, logged out, logged back in and it was gone. Also didn't see a way to transfer the trip to the GPS. Hopefully they'll fix this soon.
I also use RandMcNally Tripmaker http://tripmaker.randmcnally.com/ which is the same as Good Sam's old trip planner minus the RV warnings and campgrounds.
I really count on the RV warnings, so I hope that either Rand McNally Tripmaker turns them on, or Good Sam fleshes out its new trip planner to offer both the ability to save/edit trips and to transfer them to the GPS.