Damn, I was hoping to be able to eBay @David47 but I didn't know the routes of the guards so I keeps running back and forth not knowing when to lure someone since they seemed to walk all over the place.
When I knocked out the guy by the water I had to drag his ass around the area for two minutes trying to make out where the two patrolling guards went. After I got all of the guards knocked out and started dragging them to the pavillion one security guard saw a body and came rushing in. I had to knock him out as well and since he woke one of the targets up I had to re-subdue him before continuing
I enjoyed the contract even if I was rushing since I didn't have much time to complete it (even if I very rarely spend more than 5-10 minutes on a contract which usually means a fail is coming...)
Edit: I just re-read the conditions, "Suit only" is that only for the kills or for the whole play through? Because I changed to the guard disguise once so perhaps that means I failed?