The easiest thing to do would probably be to phone the SATCO and ask all your questions there. They're often a really helpful bunch.
I recently flew into RAF Wyton. Prior to doing so I phoned ATC and spoke to an extremely helpful lady there who both answered all my questions and took care of all the admin/paperwork trivia. It's not entirely straightforward but it's not too bad. The most ambiguous part in my experience was working out what I should be paying for the landing fee.
Anyway, best of luck with it!
ASI
P.S. If any of the Wyton Air Trafficers read this - many thanks to Heidi!