The experience of doing these things was fun and the guides were all friendly and well versed, though some guides were more engaging than others (we were satisfied with all our interactions). If you don't have access to a vehicle, it is absolutely worth purchasing a 48 or 72 hour pass on the buses, otherwise, a 24 hour pass is plenty. If I were to do this trip again, that would be the only thing I would do differently, I wouldn't bother with a 72 hour pass. All in all, it was fun and a decent value. It was simple to redeem our vouchers and use the tickets. In August, you are definitely going to want to do the boat ride in the evening, if you can. The buses are air conditioned (not fantastic air condition, but much nicer than outside).