My dad used to build custom cars, in his garage out back. He wasn't a car builder, he did it for fun. After a lot of work, screw ups, etc, one of his cars won an award at a show. It was quite an accomplishment, considering the amount of payed and professional done cars in the show. The point, what do you want out of it?
If you want the biggest set of antlers to hang on your wall, sure a guide would give you a better chance.
If you want the total experience, and the sense of accomplishment that comes with it then not.
You can hire horse packers to pack you in and out.
Short of sheep hunting with its size requirements, I personally don't see why you would hire given your circumstances. I personally would rather hunt with "my guys" and risk not killing the world record, rather than with someone I don't know. Personal opinion.
"The only thing that stops a bad guy with a gun is a good guy with a gun"