sliding seat for rowing will make our chosen form of auxiliary propulsion (since motors aren't allowed) much more productive.
I researched pedal drive options because I like that concept. And a number of boats in the R2AK have made good use of pedal propulsion. But those units involve a lot more work and money to install. And they may not necessarily move my boat any better than a pair of good old-fashioned oars (with a nifty sliding seat—Thanks again, Gig Harbor Boat Works).