portal materials. 2 iron ingots for the stone cutter to farm black marble more effectively i leave these in the ship unless i visit a mistlands biome. the swamp key if i go to a swamp. a dvergr lantern. full stacks of each food.
materials for a karve have been handy in exploreing the mistlands from offshore as getting the longship trough all these rocks is quite painful depending on generation of the biome.
some copper nails for a cart in case i stumple upon huge chunks of metal i wanna bring back to the ship.

thats about it.

but exploreing the map isnt even that much needed. it takes a long ass time to empty the resources of a biome of decent size.