Two miles is not nearly enough. Dog power is better, as water does not short it out. As for roof racks, I prefer to kayak in the water rather than on top of a speeding Subaru. Michelle, I live near Tenants Harbor, and do most of my kayaking in the Saint George river, where the principle hazards are too many lobster floats and marauding harbor seals. The eagles usually don't attack kayakers, as they are to busy stealing fish from the ospreys or spooking the crows.
MD