Splash,
As Poly hive says, or split, raise another queen. If successful, go from there. Little lost.
Two queens would lay twice as many eggs as one, late in the season. Might be good for uniting if nothing else.
Even with 6 hives there is probably not enough spare brood when you want it.
That is what I am doing just now with a nasty aggressive colony like yours - except mine follow about 200m! If it works out, all well and good. If not, nothing lost.
At least you can make the split develop a QC from one of your nicer colonies.
Just keeps your options open.
Regards RAB