Storage Boats Mod provides you with a boat with a chest in the game. It will let you store up to 27 more stacks of items on your travels.
See also: Obsidian Boat Mod and CompactChests Mod
There are now boats for all wood types:
You can open the boat’s inventory by pressing the E key while you are sitting in the boat:
To craft the storage boat you’ll need a boat and a chest!