I would agree with you, I think its great exercise espacially for the older people playing the game gives them a chance to catch up on some excerise while having fun.
I rarely ride, but I do have my own pull cart. Riding provides too much extra room for a cooler full of beer, and that causes my game to go down hill fast!
Me and Golfbdh (blake) have had some awesome rounds just becuase we had a cart. Like this one time we were going top speed and Blake decided to take a 90 degree turn the cart almost fliped but it was awesome.