Hi Alex, I paddle anywhere between 3Kms and 15Kms in a session, but as you say, it depends heavily on the conditions. I paddle an espri (for now :twisted: ) and it get's pushed around a fair bit by wind, but I can cover 6ks in an hour with a mild headwind and can do it in about 45mins with a tail wind if I imagine I am Grant Kenny back in the 80s.
I have at times found the longer paddles quite challenging, but as long as there's a fish in my sites or more preferably one in the bag paddling doesn't seem too much of a challenge. I love the exercise and the upperbody strenght developed by paddling, it's helped my average posture a lot. Hmm, now I just need to find a way to get those abs working while I paddle.