It always seems to me that the hardest part of a "retirement" job is the lack of flexibility - but it sounds like this part time work gives you as much flexibility as you could want. You can choose shifts and take extended trips if you want. You probably don't need to work, but the money gives you some nice cushion or allows for a few extra splurges. And it sounds like you enjoy the professional interaction, the ability to stay current and the opportunity to mentor the younger doctors.
So no, I don't think you need to work, but it sounds like a pretty good arrangement and you may want to keep at it until you no longer find it rewarding.
So no, I don't think you need to work, but it sounds like a pretty good arrangement and you may want to keep at it until you no longer find it rewarding.