So far on the batches I have made I bottle the beer out of the primary as soon as the airlock stops bubbling. Last time the hydrometer reading seemed kind of high but it looks like the fermentation is done so I bottle anyways and just keep the reading for my notes. Anyways this usually means my beer ferments from 3-7 days before bottling. My questions are: Is there more yeast action getting done that you don't see on the surface? and if it looks done do I really need to check over a three day period with hydrometer readings?