Use of MoD Airfields
Use of MoD airfeilds is very much up to the individual base. The correct official way to do it is to submit a request to MoD wider markets at RAF High Wycombe. The Contact is Mrs Diane Fane on 01494 494191. You fill in some forms and she sends them to the base to see if they will let you in. The difficulty can be in the security of you going around the base to get off and on again. Someone will have to escort you and thr RAF police are refusing to do it.
Some RAF bases do let you in if you just phone them up.
Good luck but inverness is not too far down the road.
MM