We've always had a surge of wasps around this time of year - March/April.
They buzz along all the fencelines of our property (we live suburban but next to a bush reserve) and I think their nest(s) hide in the trees in the bush.
Been meaning to do something about ot for years, but never got around to it.
Only been stung once...right on the nip. Stung like hell...and felt like an acid burn for days. Hate wasps. But clearly not enough to do anything about it.