I would:
Bring cash. Twice as much as you think you could possibly spend and still be sane. Friday morning plan to hit an Atm at some bank to re supply. Have a variety of bills so you can pay quickly and not wait for change. Restock your cash supply when you drop off packages at the car. Bring a dark sheet or blanket to cover the purchases with. Make sure they are not in the sunlight.
Wear comfortable shoes and layers of clothing you can strip off as the day wears on.
If you see it and it's high on your list and it's reasonably priced buy it then. If its a steal, just pick it up with a extended handful of cash.
My places to park are 1) between the orange hall and grandstand, 2) between the purple and red ( covers black, purple, red & white) 3) between blue and silver. Use the shuttle if its sitting outside the hall you come out of
Keep a cooler with drinks and some snacks/ fruit at your car. Snack quickly while you drop off purchases or layers of clothes.
Get your badge/ badge holder before noon on Thursday at the silver hall.
If you are worried about the lines at the opening bell at orange hall, then go around to the side or back entrances. At the red it takes about 30 seconds for all to get inside.
A lot of vendors have bags to give you. If its really large take it straight to the car.
If you are primarily interested in the dealers in the orange hall, look up their locations on the table layout maps outside the front lobby and plan your attack.
If you've never been before, then plan to be in awe of the sheer size and diversity of product.
Don't be afraid to negotiate price, all they can do is say yes or no.
Don't sweat the small stuff and have a good time. If you miss a deal, just put It on your future wish list. York is an experience you won't soon forget.
By all means stop, face the flag, hand over your heart every morning when they play the opening music. It's just good taste and respect for the people who sacrificed to give you this and other opportunities that you are about to enjoy.
No one is taking a knee at York .