I find snowblowing a bigger issue than weeds. After all, weeds don't really hurt the function of the driveway. The first couple of storms (before the base has frozen solid) I always manage to blow some of my gravel out onto the lawn. Not only is this a waste of good gravel, it is also a potential mowing hazard until the gravel settles down into the grass ...or it would be if my wife didn't insist on me gathering the gravel off the lawn in the early spring and returning it to the driveway.