There are a lot of winding country roads around here 1-1/2 lane seal with gravel edges, occasionally a car will scoop gravel all over a corner - so - plenty of practice.
O.K. DL 650, K60's, so good bike, good tires for this. On the blind ones, or ones where I can see gravel early I'm also turning the bike early - wide in, aim to cut straight across the apex - so the bike isn't leaned over much on the gravel anyway. If it twitches, just relax, ride it out - there's essentially NO input into the controls from me at that point.
It seems to be lean angle as much as sliding that causes serious problems, basically because the bike tends to just fall down when the tires loose grip - hit the ground and it's pretty much all over - so having the turning mostly done before the possible gravel makes it much much easier to cope with.
And as others have said "Ride dirt" - if you were doing 50-60mph on hard packed gravel roads last weekend, then that little scatter on the corner is nothing.