Steve,
it's a case of welcoming everybody with open arms while keeping your doors and windows locked - and curtains drawn. There's no point in being foolish. We did open the garden to the public at one time as part of a local garden trail and so have experienced the public around the garden, but now will only open for our local garden clubs; that's enough for us; we know most people coming and it is a different atmosphere, more a get-together than anything else.
Hope you enjoy it all, have every success and go from strength to strength.
Paddy