You can get metal clips at your local hardware store (they look similar to this -
http://www.berkeleypoint.com/product...pringclip.html).
If you place at least one in every corner, a couple along the longer sides and a couple on the door - you should be able to keep your pup in the crate.
A bark collar is just going to acerbate your problem.
And no - good exercise is ok (and don't forget mental stimulation) but running for that long is definitely not good for the developing joints, bones and muscles of a young dog.