There are lots of good reasons to practice at short ranges indoors. It's a great way to work on blind bale shooting, form, release technique, and most other aspects of achery.

I know people who print out 5-spot targets at half-size, which at 10 yards, gives you a fairly accurate way of practicing a spot game. I've done this for years (I can go back to 15 yards). It's how I learned to shoot a back-tension release, among other things. I used a large Morrell bag and fortunately, I never missed it (not a given when learning back-tension).