A u-boat like a Flote-N-Tote with a seating platform and a place to rest your feet out of the water would be suitable for the mellower rivers on the west side.

But trying it in a float tube where your ass is in the water and your feet have no place to rest is just looking to get killed.
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She was standin' alone over by the juke box, like she'd something to sell.
I said "baby, what's the goin' price?" She told me to go to hell.

Bon Scott - Shot Down in Flames