Nice drive... done it a couple times... i burn about 30 gallons there and back. There is 87 octane at walters and 91 at fishers... so you'll be cool. Few sandbars... but most are pretty damn obviously visable... especially with polarized sunglasses. Purdiest part of the river is just below walters to picacho... lots of cool scenery and not a lot of boats.
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