2) 30 steels for trying to make fire you would need to stay warm during the long winter. If you're not warm then you could possibly die. 

3) 10 pounds of sewing threads this will be nice for the natives because they make all of their own clothes and blankets, rugs, etc. 

4) Blankets this can cover your whole entire body and keep you warm. You can also cut it up and make your own little sections of clothing. 

5)Knives can be used for multiple things, cutting, hunting, eating,etc. 

6)1,300  doses of physic because for a lot of people you will need a lot of medicine just in case someone gets sick. 

7)a two-volume edition of Linnaeus (the founder of the Latin classification of plants) I feel like this would be helpful if they come across a new plant and they have no clue of what it is. 

8) chronometer (needed to calculate longitude) because they were making maps and you want everything to be as accurate as possible. 

9)150 yards of cloth to be oiled and sewn into tents and sheets because they will need shelter to sleep in. 

10)500 rifle flints to use for more protection.

   I would take Meriwether Lewis because he was trustworthy. He had experience as a leader, which would be a good person to have with you. Lewis was also the captain of the army, so he obviously knows how to defend himself and others. If he was trusted by Thomas Jefferson, I trust him. Another good thing with Lewis is, he was already experienced with plants because of his mother, and that would be good to know because he could say if it was good enough to eat or not. 

   Pierre would be a very helpful addition on the journey. First of all he could help us find our way around the land. He could help us trade and avoid conflict with the natives. He could also keep us entertained by playing the fiddle. Another good component is he was small so he wouldn't take up too much space, or eat to much food. 

   Seaman had went to gather a beaver from the water that was shot down by a member of the Corps of Discovery, and when doing so he was bit in the leg. The beaver bit through an artery, and Lewis said it was hard to stop the bleeding. Seaman would be a good addition on the trip because he can protect you from other animals, or just warn you about threats. Also he can hunt for you. 

     This is where things went downhill. Meriwether and Clark mentioned that they were allies with the Blackfeet enemy the Shoshones. The Blackfeet did not like this at all. So they decided to try and attack Lewis and Clark in the middle of the night and steal their guns. This caused members of the Blackfeet tribe to be killed, becoming the first bloodshed between the western Indians and reps of the United States.