I am looking at the idea of pollination contracts in my region, and I wonder how much stress it is likely to have on my bees.

The most lucrative contracts in the area are for blueberries, and I understand that blueberries aren't great nutrition for bees. On the other hand, many of the blueberry farms in the area aren't that big. So it seems likely that bees can easily forage beyond them.

The farmers are mostly within an hour to an hour and a half from my home yards, so they would never really be undergoing long travel, or great climatic shifts.

If a person really wants to maintain healthy bees - how much strain do you think this type of activity will put on them?