Some great ideas - thank you. So after educating myself on the intricacies of "proper" hypalon repair (excellent video on NRS, BTW), I've come to the conclusion that what I need to prepare is a "trip saver" kit that will get me through a few days on the water. Then I can do a more permanent repair when get back home to the shop and all the proper heavy duty supplies and toxic chemicals. I just don't see myself buying, storing, and using all the materials to do a "proper repair" unless I really needed it.
For this "trip saver" kit, it seems that there should be the following:
I think I can probably manage to easily stuff all this into a dry box.
Thanks for the suggestions!