thatoneguy... I'd replace your water pump before your trip just for peace of mind. When the pump goes out... there is no warning. Also replace the e-thermostat and the U-shaped hose that connects the two units. On my car the thermostat housing cracked and was leaking coolant. Not a drop on the garage floor... but IF you looked down the radiator fan... you could see coolant collecting inside the belly pan. Go look at my water pump poll... lots of forum members pumps failed way before 80K.
I would also bring along a spare tire in case you get a flat. Toss one of your snow tires in the trunk IF you have snows.
Dackel