One thing to remember about making wine, the yeast have no idea of how many days it has been, second thing to remember is that airlocks lie all the time and if you try to determine anything from bubbles in the airlock or lack thereof you are doomed to failure. I often will clamp the lid down and put an airlock on my white wine ferments, since white wines oxidize so much easier.
Even with that,I open it every day at least once and stir the whole thing. I think it helps keep the yeast in suspension and does the first step of getting the CO2 out of the wine later. After the ferment starts to slow down, around day 5 or 6, I'll clean and sanitize a hydrometer, then drop it into the bucket and leave it. Some folks worry about the hydrometer breaking in there, I haven't had that happen yet and don't. I don't stir hard enough to break the thermometer. If I'm doing a red wine, well the lid is open, so I generally leave the hydrometer in there from the beginning.