Bring tools, camping stuff (water and showers are available), bows, plenty of arrows, trade stuff (hunting stuff, primitive supplies, etc) and yes, money. There will be everything you need to make bows there, for a price, which can range from gifted to full retail.
Oh, and a notebook. There is no way you will be able to remember all of the information that is shared free of charge. There will be the best bow makers in the nation there.
If you are looking for something specific, put feelers out before hand. Last thing you want to hear is " I left that at home".
Kyle