Tips for Oshkosh

Having been several times over the years I can only offer the following advice:
Make the most of it because there is nothing like it anywhere else.
As per other comments drink plenty of water (there are fountains everywhere) and wear a good pair of walking shoes. Even if it’s cloudy it’s usually warm. There can be the odd thunderstorm but take that time to look in the exhibitions.
Take advantage of the tractor/trailers that patrol round the site. Free!
Stay until late because the light is better and the crowds thin out.
Think of your favourite aeroplane and there’ll be one of every model and every colour. There will also be a hundred you’ve never heard of before!
Definitely, definitely visit the seaplane base. Two dollars return on the yellow school bus. Everything from microlights on floats to Grumman Albatross. (Get the tour boat ride round the ‘harbour’ which I think was a couple of dollars donation).
Take twice as much memory for your camera as you think you’ll ever need.
Don’t expect an airshow like here. Very rarely a published itinerary (except “warbirds on tuesday” or similar). You will miss lots displaying or arriving that you’ve always wanted to see but didn’t know were there.
The Warbird Park is my particular favourite and we always started and ended there to see what else had arrived, fourteen Mustangs and forty Harvards is not unusual.
You can wander almost anywhere in the aircraft parks but don’t put a foot over the crowd line or you’ll be jumped on by the ‘crowd line police’ on their scooters.
Don’t listen to the commentators on the tannoy – they’ll drive you nuts.

Otherwise I can guarantee the time of your life.