It's true that we would have liked to spend MUCH more time but it's just not practical on a cruise itinerary. Grueling is probably an overstatement but there's no way around it being a tiring day. There were some in their 90s with us and I hope I can do stuff like that at that age! The day was well broken up and there was always something to enjoy, even if it was a nap on the bus!
About the review, I'm having trouble getting it submitted. I hope I can get it accepted in a useful format. I put a lot of time into it and really would like to share it with you and any who might be considering taking this excursion. Keep your fingers crossed and I'll let you know when it gets posted.