I've been on these forums a long time. I can tell you that from what I have observed over the years, bow season BY FAR, brings on the most threads posted about "shot one this evening...tracked it for a while and lost blood...". Most always, this is blamed on an equipment failure of some sort; most often, the broadhead. When in reality...the problem was more than likely the person behind the bow making a bad shot or a bad judgement on taking a shot.
I also don't put stock into the "practicing at longer yardage will make the short yardage easy" thing. If that were the case, all the tournament archers would be shooting at 100+ yards to make the 50 yard shots "easy". In reality, the closer ones are usually the ones you mess up the worse on. We just finished up the 2014 3D archery season and I kept duplicate score cards of all the shoots that I shot, and made notes on the yardages for each target. Do you know what my data shows? I spent the majority of my time practicing at my upper limit yardages for my class. And seldom shot at the closer yardages. Why? I was thinking the same thing...if I can hit 12 rings at 40, then the 20-25 ones will be a cake walk. And my data shows right the opposite. This was also observed when shooting with other people in groups this year. I recall two specific targets at the Tuscaloosa, ASA shoot that are a great example of this. One was a deer target at 18.5 yards. Out of 5 shooters in my group, 4 of us shot an 8 on it. I was a 10 and still missed the 12 ring. This should have been easy to hit an inch and a half circle at 18.5 yards. The VERY next target was a 40 yard coyote target...one of our smallest targets. All 5 of us shot and hit the 12 ring on this target. This spawned a discussion between our group regarding what yardages we mostly practiced at. All of us were shooting at the upper limits to our class.
So knowing this...I say shoot at the yardages you plan on shooting at. Practice those.