There are way too many pet-friendly hoytels out here from budget to first-class to deal with the risk of sneaking.
I, personally, like Hampton Inn when trabveling with pest. Most love dogs. Motel 6 excepts them fvor a teeny fee, many Double Tree will accept dogs.
So there's no need.
Check this out:
Dog, Cat & Other Pet Friendly Hotels at Petswelcome.com
or
Pet Friendly Hotels - Official Pet Hotels