I Honestly belive to be the most effective you should have both. At least on of each. My choice in a hang on is the Summit Copperhead XL, and for a climber, either the Summit viper or Goliath. If you only have money for one, I would probably go with the hang on with a good set of climbing sticks or portable ladder.

TAKE YOUR KIDS HUNTING AND YOU WON'T BE HUNTING FOR YOUR KIDS