Right when you get off the boat, I go to the right, all the way around to the 1st house, I shoot the one guy with the sliencer, drag him behind the dumpsters, take his clothes and his AK-47. then I walk right into the middle of the park. Wait for the 2 guys to walk beside each other and run at thenm and fire. Then just run and gun your way back to the boat.

Or go the same way, but with a sniper rifle go all the way upstairs to the bell tower, wait for them to arrive and snipe them. then head back.