I used to go private and trade, also to the car equivalent and to be honest treat it as a day away. there is a lot of talk , a lot of carrier bags with freebies in, oh, and a lot of people.
you may get a minute to sit on a new model of GSXR (other makes are available), some of the salesmen aren't that interested as its a long day/s for them. you can get deals on helmets, and cheap sub continent leathers but better off looking elsewhere for bike deals. you will probably buy something you don't need, beer and food tend to be expensive.
the stage shows are ok , but take up time and you need to be there at a certain time.
then there is the car park!!!