We had a stray yorkie that we keep for awhile and he chewed through his harness while he was crated one day. So I don't ever keep harnesses on them.
My other Yorkies loved clothes so that wasn't a problem but I always did take off the collar while i crated because once I came in and found her caught on the crate from the o ring on the collar and that really scared me. What if that had happened while i was gone of the day