Use PL Premium. Its usually used for attaching sub-floors and decks. Its urethane based like gorilla glue but is mixed with a filler so it gap fills up to about a quarter inch. It comes in a caulking tube, will cure in cold temperatures, moisture actually helps it cure (the specs say no standing water, but other than that it doesn't care). Also has a high initial tack, but if its something really awkward I just use duct or masking tape to hold it all together while it sets.
I love the stuff. I have a SOF cockpit coaming I laminated with the stuff 3 years ago that's still going strong, and I had like 1/8th inch gaps between the lamination.
Oh, and wear gloves, it sticks to your skin like crazy, then causes any dirt to stick to it. Hands end up black for almost a week.