Re: To tell or not to tell?
My answer will depend on whether the neighbors can see the location where the hives will be. If there is no line of sight, then there is no reason to tell the neighbors. By the time those bees reach the neighbors property lines, they will be dispersed well enough that they might as well be invisible.
Make sure you offer your bees an attractive source of water close to you hives. In this case, attractive does not necessarily mean human quality drinkable water. Bees seem to prefer water that has a distinct smell/taste. This might include chlorinated pool water, compost pile runoff, and even water in a "muddy" cow pasture (and all the fluids that that term implies.) This is especially important if your neighbors have pools in their yards, or fountains, etc.
ultracrepidarian >> noting or pertaining to a person who criticizes, judges, or gives advice outside of his expertise