Ratpup,
If you are going up on an official Realistic Job Preview visit you should get an itinerary through from the AFCO which booked you onto it. If it is an ad hoc visit, contact the chap who organised it for you. If the format is the same as it was when I used to attend these things, it will entail a day of visits to various sections around Boulmer, followed by a few beers and a nice sit-down dinner in the Mess. The next day is more visits and briefings with either another night in the Mess or a trip into Alnwick, the local town, to sample its delights. But don't quote me. You will find a lot of the guys and gals up there very helpful regarding the Branch, its future and the options available to you. Don't be afraid to ask questions, and see if you can track down some of the folks with experience of the E-3D and 1 ACC, as they will have some interesting tales to tell. Hope you have a good visit, it should really help you decide if the Branch is for you.