I wonder if you could boil down the juice into a syrup to concentrate the flavor without destroying the delicate favors of the melon? The other option would be to do a PM and use the juice(large amount) as the cold water to mix in with boiled wort?? I'd also look up watermelon wheat recipes and maybe use those, but sub the different melons. I think the honeydew sounds better than cantaloupe for a beer, just MHO.
"Did you ever kick a woman in the midsection while she was wearing a whalebone corset? I nearly broke my great toe. I never had such a painful experience." -Egbert Souse(W.C.Fields)