Cumon Skyman this is not Cape Cannaveral, its a regional airport. Many airports especially in the US have great facilities for the non aviation public.
All that you need is someone who 1.can be bothered and 2.Doesn't treat an airport like some secret facility where you turn up,do what your told and then GET OUT. I looked at a run down villa next to the runway at Malaga on Sunday and thought if you did it up, supplied just basic facilities and catering you would make a bomb. And so could Newcastle airport.
People will always migrate to airports and aircraft, you can either encourage it and hopefully encourage aviation enthusiasm or ignore it and have safety exits crammed full of cars trying to sneak a look. In Las Vegas they even have a dedicated layby on a road litteraly next to the runway purely for enthusiasts and people seeing off their relatives. Hell the approach frequency can be picked up on FM and is advertised as so.
Bravo Newcastle if it comes off and Viva Las Vegas.