Suggestions...wear some real comfy shoes, you're gonna be on your feet a long time.
Wear a hat of some kind, even though it may be cloudy, the sun will still fry your skin and hair.
Take a fold up grocery buggy with wheels if you have one. I've had one for over 30 years and it's still working nicely. I put inside it an old green sleeping bag holder from my hubby's army days, it holds in stuff so it doesn't drip out and drag on the ground when you are busy looking at all the marvelous things you want.
Take water bottles with you, you need a lot of water.
Take lots of money in smaller bills, and put them INSIDE
your over shirt and if you can sew in pockets, that would
be much safer. With lots of strangers around, not all of them
will be nice ones, sad to say.