A few points….
have been 14 times since 1982.
Join EAA well before you go…provides some advantages
Plan to stay the week (you still won’t see it all)
Good pair walking shoes, small backpack
Work on accomodation and confirm, before you get there. Plan to arrive day before it starts, gives you a chance to famil with town etc
If you intend to hire car, book asap (car is handy if you buy stuff , you can put it in the trunk & keep walking)
Plan your arrival well in advance (suggest via ORD)
if you are serious photo taker, you need more than an iPhone
enjoy!!