In the second day progressing through the golf course you will find them.
1. Just at the beginning - you wont miss at as the game will show it to you
2.After you take the boat the course will have a dirt line on it - watch out on the left on another piece of land you will see the tin
3. after some rabbits on the right you will see a piece of land - on your piece of land there will be a platform to stand on - when you stand on the platform the left land will start cu spin - hop down when the tin is closest to you
Click on the video and it will jump exactly at the section that covers the Golf Course Treasure Tins.