OK so has anyone been to Beauvais recently...have heard stories about issues with security...?
Been there a couple of months ago, but only departing as pax on a commercial flight. There definitely were some movements of light a/c, saw a couple of Cessnas taking off.
Not the most accessible of airports, though. Unless you rent a car, you need to get to the train station (taxi or shuttle bus), then take a rather slow train to Gare du Nord. From memory, this takes between 1 and 1 1/2 hours. So airport-central Paris is 2 hours at least. IMHO you might well be better off in Lille.