I'm just a multi-pin sort of guy........too paranoid to shoot just one pin in case I get that broadside 40 yarder.

Anyway, if your bow is fast enough it's not much of a handicap to shoot just one pin for most real world bowhunting distances, however if you have confidence from 30-40 yards and the shot presents itself, a single pin set at 20 yards IS going to be a handicap plain and simple.

If your personal limits prevent you from shooting over 30 yards then set that 1 pin for 25 yards and compensate accordingly. A little high...a little low.

If you plan to shoot farther I recommend at least 2 pins, 20 and 30 yarders.

Just tell yourself on a 25 yard shot to "Bracket" or "Gap" the target. Just frame what you want to hit with the 2 pins evenly. Don't aim high or low with one pin or the other.........just shoot the air in between. This is actually very accurate and your mind will naturally center everything for you.
Then If a 35 yard quality shot presents itself you will also have a 30 yard pin and will not have to aim off the top of the animal like you would with just a 20 yard pin.