Hi Kell.
 
Last summer I got a fonecall to capture a swarm in a comparable
location.
 
I tackled them with a skep upside down tied to a aluminium ladder.
1- Try to shake them loose and hope for the best.
2- Then lower the skep and tie it in the normal upright position and
place it near the old location of the swarm to capture the rest of the
bees.
3- Lower the whole bunch of bees VERY CAREFULLY as soon as it becomes
dark.
 
WEAR FULL PROTECTION. You are the one to receive it all :-).
 
Lots of succes,
Gerhard Pape, Ermelo
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