The "tape trick" is damn near a MUST-DO for any bedding job as far as I'm concerned ... it only helps, and never hurts, to make sure that the barrel is centered in the channel, and is set at a proper height should it need any lift before bedding.
Even if doing a full-length-neutral-bedding job on the barrel, you can always just tape the barrel at the very end of the bbl channel of the stock for laying down "phase 1" of the barrel bedding ... and then it's up to you to leave that space there, or fill it in later with more bedding material.
again, there are NO drawbacks to the 'tape trick' ... just make sure you put the correct thickness of tape around the barrel so that the action sits properly in the stock when bedding... too much tape will result in an upward angle of the bbl'd action in the stock - but it's very easy to avoid that when setting it up.
