Hey man, that's where I live! Unfortunately my garden is too small to pitch a decent size tent in it, and anyway like all sane residents I'll be getting the hell out of there for the weekend. 18th-20th is the public access part, but the week before is for contractors and government buyers, and then the week before *that* all the planes are flying in and practising... you get pretty sick of the noise.
It's not really a tourist area so there aren't a huge number of campsites around. I reckon your best option might be the one by the Basingstoke Canal at Mytchett if they have spaces available, it's nice down there:
http://www3.hants.gov.uk/basingstoke-canal/campsite.htm Don't be put off by the 'Surrey' address, Farnborough is right on the Hampshire/Surrey border. That would let you walk the mile or two to the airshow through residential streets and the Northcamp urban village. You don't want to drive into the airshow site if you can possibly avoid it, the local roads struggle to cope with all the traffic and it can be gridlock and chaos despite everything the police and council do to keep things flowing. Avoid trying to drive along the main A325 road from Farnham/Aldershot into Farnborough at all costs, you will be queuing a *long* time. If you possibly can, leave the car far away and walk.
Check out the Aldershot Military Museum while you're here, they've got some good kit. Quite a few other little regimental/divisional museums around the area too as Aldershot is known as the 'home of the British army', but sometimes they're on barracks sites and you need to book in advance to get access.
Welcome to England and enjoy the show. You're welcome to it, I bloody hate it! I'll be down on the coast with my gf
