Years ago our training group, males and females, would watch for a day in the spring when we had a predictable strong wind. We would talk someone into driving us out to an upwind starting point - we had designated routes for this that were north-south or east-west. Then we would do a group ride with the wind. I recall one of our routes had about a 25 mile segment with only one stop sign - so we essentially got to motor pace without having to follow a motorcycle. If you think a tailwind is easy, try going as fast as you can for 45 minutes.