Jerry
I have no clue about the taxidermy quality there - but find out for sure what it will cost to ship a mount to you when completed - ...then compare that with getting the horns home yourself and having local taxidermy done. I worry alot about capes/horns when I travel to hunt, so my advice to you is #1 - if you don't know how to flesh the cape (not much needed on a 'bou), turn the ears/eyes/nose then LEARN HOW! Find a local taxidermist to show you. #2 - Make sure you'll have access to enough salt to take care of a cape properly - at least 20 lbs for a caribou shoulder mount. I've went as far as flying in salt vs. my weight allowance to be sure. Trust me, its a sinking feeling to have a dead caribou and find out there is a 5 lb bag of salt for the whole camp. Getting a properly salted 'bou hide home won't be an issue - put it in a checked bag. The horns...I don't know airline regulations anymore, but mailing it is one possible solution. Cut in half lengthwise through the skull plate, lay the antlers together and build a box around it or wrap in a quality gamebag (like canvas) and tape it up. Mail it home to yourself with a few thousand dollars insurance on it. One option.
Maintaining velvet on an early caribou can be a real pain - I don't know how you'd do that in camp nowadays. Back in '94 I took a quart bottle of formaldehyde and a big horse syringe along and injected it myself. I wouldn't recommend crossing the border with things like that today.
Managing your capes can be a headache, but is doable, and even mandatory, if you want to be assured of a good mount. I managed getting my full mount muskox hide home from the End of the World to Indiana. I don't know what the folks in the hotel in Calgary on the way home thought about the crazy guy in the parking lot working on a whole muskox hide, but got him home ok. That was a 96 lb checked bag right there!
Good luck!
Ryan