"My guess is you could reduce that to none if you removed all the queens in a yard, ate your lunch and then put the cages in..."
What if your not hungry? LOL!
One loss of 150 is probably as good as your going to get, lunch or no lunch. had an order for 12 queens last year and one was dead. Picked up 6 queens and it started pouring and could not get queens in for a couple days and one was dead by intro time. Some are going to die no matter what you do.
I have had no problems with 4-6 hours. I make the nucs, go get queens, grab a bite to eat, wait as long as I can before I have to go to work or before dark and put em in. Have had good luck every time so far.