One of the steps in instructions on how to make down gear is usually to isolate yourself - in a tent, a bathroom, a closet, or some other easily cleaned, confined area - to maneuver down into the baffles.

Then there are other instructions involving using a shop vac with a clean pair of pantyhose over the business end, to move down around.

I suspect opening a baffle of a down bag in an unconfined space will resemble something like having a flock of exploding geese fly into your house.

Observe the many ways backpackers have dealt with this issue.
http://www.backpackinglight.com/cgi-bin/...thread_id=33573