Been to most Salutes in the last 20 years, some have been better than others, always managed to get some bargain or other, but it's also the buzz of all the wargamers in one place, the games and meeting traders face to face.
It's best to have a plan. Are there certain things you want to check out before you buy? A set of rules you are not sure about and want to see in action first?
Things like that. Planning ahead a little will make it a much better day for you.