Honestly i may be willing to trade First aid kit for fishing pole... but i'd need to know how much line and how many fishing hooks. Also depends on how many matches in the match box.
What's nice about the boat and tent is a quantity of one is sufficient.
Hmm, I think an axe is important. If you have an axe, you can build a shelter, and repair stuff. The tent will be soon or later gone after a strong storm, but with the axe you can build smth. new.
you can build a habitation but i doubt anything good enough to protect from insects or rodents AND you need something right away. Axe is a great one. And maybe i'd consider it over first aid kit. You can't live in fear of something breaking... the axe can break.