If Durnkrag has the Stunning Fist feat, that would account for Mac taking a nap. He wasn't out for that long, after all. If he played dead and bided his time until the Dungeons Crawlers got distracted, he could make his escape unhindered. Mac is a rogue/fighter after all. They do a fine line in sneaking.
I wonder what his attitude would be if Bea is pregnant? I doubt either of them used protection, given they were drifting in the middle of the ocean in a rowboat. Would Mac own up to his responsibilities or would Durnkrag have to hunt him down and drag him to Shotgun Pete's Wedding Chapel?
Nihil est ab omni partum beatum.
(Nothing is an unmixed blessing)