Give your park the following name to enable the cheats:

Confidence100  100% Confidence
Isla_Sorna     Clean park
Luckybus20     Lots of buses
Bonus_Park     Lots of cash 
Items_Park     All items

Love_Park      Visitors happy
Mens_Park      Only men like park

Thanks to Revolution readers Rapt0r, Cody, Alex Payne and Justin Truesdel!