After looking at 5 shots tests and my own personal tests on broadheads I would consider one of these heads.

Phantom Broadheads (125 grains) $18.99 for 3 from Cabelas
Bear Super Razorhead (145 grain) $12.50 for 3 from Cabelas
Steel Force Titanium Hellfire (125 grain) 3 for $34.99 from Cabelas
Magnus Four Blade (125 grain) 6 for $22.99 from Cabelas.

Also don't sell a good replacement head short. Some worth checking out are these.

Rocky Mountain Ironhead 125
Rocky Mountain T-125
Muzzy 4 blade 130 grain
Thuderhead 125

If it was me I think I woudl go for the Phantoms or the Rocky Mountain Ironhead 125.

Good Luck on your Trip, I wish you the best of luck! Be sure to show us a picture of that big moose you get!