will a golf bag w/ clubs (carry bag) fit in the rear of a Cayman?
Maybe an owner will chime in, but in the meantime I remember when I was considering a BMW Z3 (long ago) as a daily driver, I brought my biggest suitcase down to the dealer. The salesman was perfectly fine with me trying to stow the suitcase in the boot of the showroom car. Also, you can call your Porsche dealer and ask. Having been in a Cayman, I would guess the answer is yes, but the club heads will protrude into the shallower luggage space over the engine.
Yup, a carry bag will fit in the rear trunk with the divider in place. Just remove the drivers and put the bag in then put the drivers back on top. Same procedure as in the Boxster. You can also put in two carry bags without removing any clubs. Just remove the divider and lay the bags forward.