I bring credit cards and checks for train items and cash for food vendors.
I don't like carrying cash around with me, if a vendor will not take my card or my check, there are plenty of others that will. There are more train items at York than I can bring home with me. If someone won't sell to me it's off to the next vendor. Even if I miss out on something I'd really like, it comes up again eventually. But in 30 years of attending York Meets, I only missed out on an item once because I didn't carry cash. But guess what? I did get that item at a later date from another source.
But beware! You can miss out on an item if you think about it too long. If you see something you want, grab it, it most likely won't be there later. Although most of my purchases happen on Saturday!
