Not that familar with the Hoyt bows, but generally, if you want the best performance from the cams, you set the mod for the short setting and twist the cables up. Set it for 28" and you have to twist the string. This will make the bow a little smoother, but with a touch less letoff, and a little less vibration. It's your choice really.

You have the rest of the summer. Try it both ways and see which you like.