I guess the question is are you looking for shows to display at such as home shows or looking for shows to see what is new.
Mants in Baltimore in early January is probably the biggest and best. Lots of plants, hardscapes and equipment.
Pants in August in Phily is a similar show but about half the size or less.
I am not sure if they still have the E.Pa turfgrass show or not. I think they do and it is in Phily in Feb or so.
There are a couple of shows in Jersey and a couple in NY, one on long Island and one upstate. There is also the NY turfgrass show but that would be much further for you.
If you want a drive, New England Grows is a great show.
My recommendation would be MANTS.