I know they fenced in the monkey area for a reason,but I think the Safari area would be better if visitors got to ride open-air vehicles.
And speaking of the monkeys,how about if the Safari put the monkeys in a special walk-thru section,like The Monkey Jungle in Miami?There the visitors got to go thru chain-link "tunnels" while the spider&squirrel monkeys climbed around you and reached for food(which was sold by the park specifically for those animals).
And the Miami Metrozoo had an amazing Gorilla exhibit:part of it was a man-made "cave" that visitors could go into and get a close-up look at the Gorillas thru plate glass.How about something like that at Great Adv.?