They will fly around there for days getting aggressive before they finally perish. At thus time of year you will lose lots of bees. I suppose you could move them and stuff the entrance with grass so they have to fight their way out. That might work.
If you’re going to do that leave a drawn super at the old site and at night keep putting it on top of the hive you’ve moved till you have no bees returning?
So, might a plan be to move just one hive at a time, leaving a week or so between hives? I presume that the flying bees from the first hive will return to the old Apiary site and, finding the hive not there, beg their way into one of the other hives that are still there? That would reduce the bee-loss for at least the first couple of hives. What if that process was reinforced by moving one of the remaining hives onto the plinth left by the moved hive (1-2m)?
If so, then I guess the challenge is the last hive to move. Could one use a nuc at the site of the last hive to leave, with some undrawn comb and stores in it to sustain the returning bees? If so, with they eventually just die off or will then find their own parent hive eventually?
In the moved hives, if they are denuded of flying bees for a while then presumably they will need feeding and/or must have enough stores to sustain them whilst new foragers get up and running? That would be a couple of weeks?
Sorry if this sounds like a series of silly questions. This is an issue only because I currently have three hives in a paddock in the shelter (eastern side) of a 8' wall, on the other side of which is our garden. My wife is starting to get annoyed at being stung while working in the garden, and I'm coming under pressure to "put your damn bees somewhere else..." I do have the option to move them more or less any distance up to 400m away, but not further without difficulty.
So all advice gratefully received.