Well, the stores were closing, we were still trying to pack, so I bought the JB Weld, and some SS screws. Then more online research, and saw that the JB site had WaterWeld for potable water tanks, a 2-part putty, so I went back and bought that....and used that, with a screw. I'll have both products with me, along with a few extra screws. Hopefully it'll work OK. Thanks for all the suggestions.