I added two full buckets of compost to a hugel bed at Wheaton Labs in the past few days. These were each as full as reasonable, and it seems like no one minded me dealing with both Bucketfuls.
Here's a photo of Bucketful The First:
I added it to this hole:
Here's the compost in Hole Number One:
Here's Hole Number One, now filled, covered, and invisible:
Here's Bucketful The Second, next to Hole Number Two, also in a hugel bed:
Bucketful is transferred into the Hole:
Hole is filled, soil is replaced, and hay mulch is returned. Nobody's the wiser:
Thanks, volunteer reviewers! :)