I live in a small cottage in the SF Bay Area.  I recently noticed that I
have a nest of bumblebees living in my roof (this is a 1930's cottage
w/a pointed overhang roof over the front door -- they are going in an
air vent by one of the eaves).  It does not get cold enough here for
most critters to hibernate -- plus it is starting to warm.  I have
remanents of an orchard on my property -- while I believe the bumble
bees to be beneficial, I am very nervous about them being in the roof.
I wonder how big the nest is  s I see a bee coming/going about every
30-40 seconds.
 
Would you suggest calling a bee person to have them relocated or leave
them?  What are my risks leaving them -- I need to start working in the
yard and when I go out they often "buzz" me -- I'm not overly nervous,
but maybe should be.  I did have a man come out last summer and
relocated 2 yellowjacket nests live (he said they are beneficial
indirectly to bee hive activity).  I didn't like the idea of killing
them, so it was fine w/me.  I asked his opinion on the current situation
and he said he might have to drill holes, or pull boards off to get his
arm in --.  Any suggestions you might have will be welcome.  I would
like to figure out the best way to handle the situation and stay safe.
 
Thank you for your time.
 
Brayton