Ryan:
You can DEFINITELY do without a caddie at all of the Bandon courses. In terms of fatigue, use the pull-carts. In terms of course knowledge, the yardage guides will do just fine. This being said, it is still very fun to take one though, and it is the best way to play - but consider it a luxury. If you are thinking about the cost at all, don't do it - it won't be worth it. If money is no object, of course take them every round.
TH