I guess so, I was told by an old timer that in the 50's there was a special train laid on for the 'local derby' between Lewes and Newhaven, crowds in the 1000's, different times no doubt.
I remember in the 1980's attending a game, I am guessing FA Cup Whitehawk against Bognor at Whitehawk, was a pretty decent crowd then and also Peacehaven against STAMCO at Peacehaven a Sussex County league top of the league clash and again Peacehaven against Littlehampton at Peacehaven in a FA...