This may have already been suggested.
What about setting up a practice ground area, where you can select what type of shot you want to practice (bunker, rough etc) rather than having to create a practice round and purposly put your ball in the areas you want to improve?
For me it would be much easy to practice my bunker shots and try to understand fully how to play certain types of shots if I had the option to go to a practice ground area and drop 50 balls in a bunker.
Is it a goer?