Buy a yoga dvd. Then you don't have to pay to go to those expensive classes. You also don't get to see all that tail though. Opportunity costs my friend.
Buy a foam roller and roll out your hamstrings and hips. Everyday.
Do situps. Everyday
Check out these stretches.
I am a firm believer that most leg issues whether injuries or flexibility revolve around tight hips and hammies. I used to tweak a hamstring running and it would sideline me every year. I do this now before I run (takes 5 minutes) and no injuries since.
If you are too lazy to do these things, you probably shouldn't boat class V. It is far more work than these ideas.
If my suggestions are too expensive you should probably not boat class V. It is far more expensive than these ideas.
P.S. Unlike BrianK I can touch my toes. Palms to the floor.
P.S.S. BrianK lay off the excuse of raising a kid. I know you have the babe in one arm and are chugging a beer with the other arm.