For BGT, if you show up early before the gate opens, it doesn't matter. Parking lot opens around 8:30am. They may open a little early if they think it will be crowded. The first ride you want to go on is Sheikra, which is in the back of the park. Go left after you enter. Then come back and ride Gwazi, and head over to Montu. Eat lunch early at 11am to avoid the lines. Kumba has short waits. In the afternoon, you can watch a show, and walk thru the zoo area.