First off the article is clearly not written by any suffering wife. It's cobbled together from a good period on a spotters mailing list I'd say, with a good dose of fiction to spice things up.
(Or can you really name any RAF station where you can bluff your way in past the gate saying you want 'a look at the museum'!!!)
As for details of arrivals such as B-52s etc. Airspace reservations get publicised - 2 + 2 often equals 5... sometimes the predictions are wrong, sometimes 4 B-1Bs really do turn up at Mildenhall.
Many CROs will happily tell you about foreign visitors expected during the year - I don't think there any security breaches going on at all.