No you can buy them at the front entrance. Mount Olympus has discounted or free tickets available if you stay at their resort .
You can buy tickets at the gate. There is a train ride you can take through the park and that is a cheaper price. We stayed at the American Hotel, across the street from the upside down White House, and the wildlife park tickets came free with our room.
No, but certain hotels have coupons off the entry price.
Nope
No
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