I can atest to the acclimating. Over the past two stockings I've lost fish do to temp diferences. I acclimated them for at least an hour by floating them in large plastic bags or by adding pond water very slowly to the stocking pail. I always lost fish at stocking or the next couple of days. I'm sure stress had alot to do with it also.

For this years stocking I went to the hatchery in April, before they opened to the public. The pond and the hatchery water temps were very close. I just dip net stocked them and didn't lose a fish.