Hi - Enjoying your PTR. The zoo here is great but very large with lots of hills! My suggestion is to buy the ticket that includes the unlimited on/off the bus tour and the skyfari. You can take a whole cycle around the zoo the first time on the bus and then decide what you want to go back to or see that the bus didn't go to. You can print out coupons online (check the mousesavers site). The tourguides on the bus are great and very informative. Check out the Southern CA section of the DL Disboards.