If i had a few bunkers, id practice shooting on the run while moving quickly from one bunker to another aiming at a small target at a realistic distance.
Then some diving drills, you may aswell get to know how to do it now instead of trying to learn at a tournament. Just use some good arm pads, knee pads and gloves and you should be fine. You may want to start off without your gun first just to get the hang of it.
Then you may wanna practice some sweetspottin, set up a box of paint at a far distance and run towards a bunker while shooting at it. This will vary on your position. If you play a back tape bunker you should be focusing on running left or right while shooting.
There are a few more but its 01:36 on Xmas morning and im tired so im gonna go to bed so i dont scare santa.
Merry Xmas
Dave