Enid, Oklahoma is very flat not mountainous as in the background behind the Diamond Times Motor Inn right at the first of the series.
Sam says Enid, OK is a couple of hours away from the bunker but actually it is about 5 hours away from Lebanon, KS.
If the spell only extends the animal powers to the user, Chef Leo's clothing should not have changed patterns when he was camouflaged into the wall before attacking Sam. There would have been a "floating" chef uniform that Sam surely would have spotted.