Bring cash. (credit OK for many dealers, but they may alter the price if paying by CC so they don't take a hit on the fee they need to pay if you use CC)
Don't depend solely on the ATMs on site (historically they run out), though I did note there were more of them last meet, so maybe that is better now. Can't say for sure since I've never tried to use one.
-Dave
However I believe you get hit with a sur charge both from the ATM machine and your bank especially if out of town or banks service area.
But I could be wrong as things may be different than when I used one years ago, and HAD to pay the fees or do without cash for repairs (and jerk wouldn't accept credit card).
And that would be the reason I've never tried to use one. I had an ATM card when I was away at college in the early to mid 90's out of necessity (didn't have a car to get to a local bank branch).
The way the ATM fees "evolved" as I was in school soured me enough on them that I vowed I would never have a debit/ATM card again. When I got the card my Freshman year, it was all good, if you went to any machine with the NYCE logo (New York Cash Exchange - have no idea if that means anything for ATMs anymore), there were no fees charged for using the card. You had to pay some sort of fee (maybe a dollar or so at the time - pretty sure back then the concept of paying 2 fees had not been invented for most transactions) if you went to something not part of NYCE or another bank, etc.
That was great as there were several NYCE machines on campus and the local supermarket for me to use. Towards the end, the only free transactions were if you were at the actual bank for which your account was at (to which I said, if I have to go to a specific bank, I may as well go inside to deal with a human teller!).
{generic ATM rant off}
Back to the topic, use Cash for most things at York. If your home bank has branches in York, do research and look up their locations on line before you go so you can get more cash if you run out.
At the Big E there are a couple vendors who still do credit cards the old-fashioned way, with an imprint of the card on a 2 part paper form, the way it was originally done years ago (that's why credit cards have the raised numbers.) For them, there is no system to fail, but everything must be entered manually after the fact.
I've got a card where they did away with that feature over the last few years, probably because those machines are not terribly abundant at this point in time.
-Dave