I've never had a pill count, either, but I have heard some people have or have doctors who say they will in the contract. I would definetly be honest with the doctor as well. I have had a pain management contract in the past that said they would not replace missing or stolen meds. I didn't really ever had a problem with that, though.
If it was me, I'd be honest with my doctor. I've had two occasions where I've been short of medication. One was when I somehow packed my prescription in with my uncle's when he was leaving here to go back to Ireland, and the other time was when my ex-husband stole some from me. Both times I was honest and both times my pills were refilled early so I didn't have to cut back.
I guess it depends on how you feel your relationship is with your doctor. Have they done pill counts before? I've never had a pill count, though I've had a urinalysis done. My pain contract does not mention pill counts or being called in unexpectedly.
Let us know what you think you'll do and how it turns out.