Doubling up on a posting...
The BEST advice I can give to you is to thoroughly check out your belts & cooling system before you start out on an extended road trip.
Even if you have recently changed out your coolant, be sure to check out your hoses, radiator & the one's going to the heater, too.
I figure it is always better to replace hoses prior to them failing: you know they've been replaced and you have a set of spares to clean, inspect and put in a plastic bag down with the spare tire.
MUCH easier to replace a hose when the replacement is in the trunk!
Same thing with belts...
Cheers!