TJ,
Yes I have read 28 myself, from outside the base. You can get quite to within about 200 metres of them (sports field to the west).
Unfortunately, they are in a bit of a mess, with a lot of panels missing, which makes identification of the others very difficult. Fading has revealed some USN identities.
Two are ex 26676 and 27732, while another is ex (513)87 – this last machine should be serial 25.
Regards,
Andy