What is suggested for exercise for kayak touring?

I am fortunate to have a WaterRower in my family room that I can spend a
half hour on a kayak trip a few times a week. I know rowing is not the same
action as kayaking but it does exercise some key muscles.

I've thought of doing some key excursions

Anything else I should keep in mind?

During the winter months, it is harder to find those that want to go outside
and paddle, but I'll be striving to do a good trip maybe once a month and a
pool practice maybe once a month.

Nathan