Long treks - i have tripod attached to my bag.
Medium distances (once the tripod is off my bag) - Tripod over my shoulder, Camera on the black-rapid again.
Short distances between locations (<500m) - Camera attached to tripod and over the shoulder.
I tend to carry the tripod over my shoulder once of my bag (with/without camera on it depending on distances) mainly because it is a faff to take off the bag, re-attach/detach the tripod contantly...
FYI - ThinkTank shapeshifter bag and Manfrotto 055CXPRO3