Anytime you can go.
Most striper guys like generation - the harder it flows the tighter you need to fish to cover - success can be a pain in the arse. When it's really crankin' a snag can spool you quickly. I like a little color in the water too. You should be fine in your boat at 2010. As you probably already know some ramps/stretches are more big boat friendly than others. I fish it with a 23 ft fiberglass boat sometimes - although I wouldn't even think about launching without a river runner.
I don't know the measurement to put the water at the top of the ramp at Burkesville but that's about the only time I pass. At that rate you need your trolling motor on high just to keep the boards from passing the boat...lol.