When the rapid bubbling slows or stops, only initial fermentation is done. It'll then slowly, uneventfully creep down to a stable FG. If it settles down @ 10 days, I'll test it, wait 3 days & test it again. If the numbers match, it's done. If not, it could take another week or a bit more to stabilize. I also give it another 3-7 days after FG is reached to clean up any by-products of fermentation & settle out clear or slightly misty.
I also prefer buckets, as they have a bigger opening that makes cleaning & dry hopping easier.