Keep in you inventory all the necessities you need, like rations and water in a flask, and whatever else you consider might come useful in the future.

There is no limit on how many cards you can put in your Inventory deck. This is made for convince, so that players don’t need keep track of how much weight they are carrying, please refrain to transport too many items, or items that are clearly too heavy for your character, if in doubt ask your GM.