Pals96, the surplus cammo will work just fine.
Relax a little and don't let the camo marketeers and their victims get the best of you. Don't flop around or fidget too much, consider a face mask or makeup (far more important than the brand of your camo), and gloves - brown jerseys are fine.
I've shot more than one coyote (and deer) while wearing blue jeans, tennies, and a dull flannel shirt. Even more while wearing Carharts and work boots. Sure, camo is better, but your surplus will certainly fit the bill.
The real advantage of all the new "fishing lure" camo patterns is the design of the garment and the fabric used. Warm and dry.
If you can achieve warm and dry by other means and wear the surplus then don't feel an overwhelming need to go drop a bunch of cash on "fishing lure" premium camo.
BTW, hunting around the round bales is a great place, don't forget to look at the top of them cl;osely before approaching. Coyotes and foxes love to dig out a bedding spot on top of them, particularly in areas where they can overlook mouse or rabbit habitat. Might get a chip shot right off the bat.
For those who don't fish I'll explain my use of the term "fishing lure".
Most fishing lures are designed to catch a fisherman and his wallet, not necessarily fish. Or at least they don't catch fish much better than the ones you already own. A lot of the camo patterns have similar success with hunters.