For work in a local area I always preferred a bucket like the Klein (
http://www.benmeadows.com/klein-tools-canvas-tool-bucket_s_132405/?searchterm=bucket) The stay open bucket is easy to get to and easy to return to. Hand carry in a local area is OK. When traveling I prefer a pack style. In years past I have seen buckets with pack straps (I think they were actually rope buckets, but they worked if the back was padded. Since you are already carrying a pack, that won't work either. I have seen some sawyers who use a vest like:
http://www.benmeadows.com/swedepro-forestry-tool-vests_36808761/ to carry their gear. Personally I find it confining, particular when using a crosscut. Another technique would be to find a way to clip or hang your bucket from the Pack you carry (I have done this when carrying a chainsaw on a pack frame). Just make sure it is secure and not swinging around.
No association with Ben Medows, just use them a lot and knew the URL. I am sure there are similar items from other suppliers.
Respectfully,
Jerry
p.s. Congrats on your B, hope it comes with a healthy raise! jf