must be something to have all those eyes around your place? I am much more of a loner type. Have just returned from a trip to Sault Ste Marie. Took wife and son there, to our daughter's place, from where they are driving to some place in US and catching a plane for Hawaii.
So, a few weeks by myself will soothe me just fine. I have a job though! I was ordered by the boss to look after her, (wife's ) dog, who isn't a happy camper at the moment. It doesn't even want to look at me. (Tried with a few treats - don't work...) So, I give you credit for your above-mentioned undertaking!
I would just make sure that bees had plenty of room. One or two frames of foundation in the brood nest and an super before you go, should do it?! If still worried, two - old single hives (old five-frame nuc boxes) in the trees, around your apiary, should prove tempting to a swarm - if one was to decide to depart? You can bait those hives with an old comb in the centre and a drop or two of lemon-grass-oil in some melted bees wax, with witch you can rub the bottom of top-bars on some empty frames...
Besides, first week in July? I would think that main swarming season would be behind you - in your part of the country? Just about is in our parts of Ontario...