Chris,

I had the same problem 2 years ago. Since the barrel was under a canopy
with the original owner (where the bees set up camp), I took it home and
put it under a canopy as well. I noticed one way in, one way out and
figured I could use a one-way gate for the bees, but they found
alternate ways out. Thus, I set the drum out in the middle of the yard
in direct sunlight. It took 3 days, but it got so hot, they left. It was
the biggest swarm I've seen, actually darkening the sky and making the
birds flying in the sky jitter as they were flying. They landed on a
fence post in my yard and the size of the swarm was as large as a
person. I was able to capture them and I still have the bees till today.
I have a big piece of property, thus it worked. If the barrel has one
way in, one way out, I'd try using a one way gate to an empty hive and
see how that will work.
Buddy Gauthier 
  
Information Technology Analyst  / Beekeeper Hobbyist
CAMECO(r) Industries, Inc. 
Thibodaux, LA  

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