A quick Dover Ferry Q

Hello! I’m wanting to get on an early boat tomorrow morning but arrive there this evening, can I go thru the booking window and tell them I want on the say 4am boat then just park up?
I can just park up on the A2 I know, can anybody clarify!?

I suspect you will be directed to lane ■■? and put on the next ferry . why not simply park up at the other end ■■

Its a my ferry account, and I could only be able to make the 21:45 ferry, which lands at 00:15, and to be honest I don’t fancy it! i’l park on the A2 and get the 04:30.
I managed to eventually speak to a human on the phone and the official line is I cant book in for a specific boat, il’ be directed onto the next available.

Not sure if still of any relevance but if you are on My ferry link then you can just turn up.