KHWS website says somewhere (or maybe I saw it inside) that you can launch nonpowered for free.
Down in Rodanthe you can launch at the ferry slip. I've done that for the last few years. Also there is the New Inlet ramp a few miles north, but the water is very shallow for a very long time leaving New Inlet. We left there a few years ago heading up to Oregon Inlet and I swear we couldn't put the rudders down for an hour.
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'00 H16 #104691
'78 H16 #32692 ex-rental [gone]
Old Holsclaw trailer
My Hobie 16 pages