A couple of quick comments...
First, double-check that combo whistle/compass/whatever else. It might add a little weight, but a Fox or ACR whistle would be MUCH better. I also cannot stand a cheap compass. If you have no compass, you know that you are lost. If you have an unreliable compass, you have a false sense of security. I was recently in an army surplus store, and some of their compasses absolutely did not work. I would much rather have a decent Brunton, Silva or Suunto compass. You can get a decent baseplate compass for $10. Then, you can pop the capsule out of the plate to make it smaller. It is bigger than your combo device, but MUCH more reliable.
Second, you might want to consider dumping the tarp for something smaller/lighter. I picked up from the local dollar store a small, rolled-up piece of plastic sheeting for $1.00 plus tax. This item is much smaller than the traditional blue tarp. It measures 8' x 12' when unfolded. I am sure that it has nowhere the durability of a real tarp, but hopefully you are rescued within a week. <img src="/images/graemlins/smile.gif" alt="" /> If you cannot find this particular plastic, then look for a plastic drop cloth in the paint section of your local department store.
Finally, have fun hunting. And don't pull a Dick Cheney: remember to get a permit before trying to take lawyers. And it takes more than birdshot to bag a lawyer. Even though they are lawyers, you should still try to be humane. <img src="/images/graemlins/grin.gif" alt="" />
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Darwin was wrong -- I'm still alive