Strums and also practicing without a dulcimer

This may be two separate topics.

I've seen Strumelia's Bump Ditty video and the recent John Keane video with the drum sticks. Mentally I understand the strum, but trying to play it while singing shows I still have problems with it. Yes, singing should always come after the playing is solidly learned, but other than the Nike motto of "Just do it" are there exercises that would help with that?

Also I plan to be without a dulcimer for a little over a week. Is there any way to practice any aspect of playing? I have songs I'm working on. Is there a way to do anything over that time to practice?