You don't actually need a yellow tag at all. All you need to do is give the claim check for the one bag that does NOT have a yellow tag to the DME CM when you check in at DME. They will collect that bag for you and deliver it just like normal. These instructions are spelled out in the paperwork that came with your yellow tags, and is a very commonly used option. DME does this many, many times a day, every day and have been doing so since 2005.
Steve