Both our kids have gone along without me. They had a wonderful time and made some great memories with their dad. Just a few weeks ago our 16 year old went for a week. She goes for at least a week every summer. He misses so much of their lives day to day, it's nice to have the one on one time.
My company didn't allow us to take kids back when they were young enough to want to come along. I think it's great when people can bring their kids along provided they can still do their job and the kids are safe and happy.