Afterwards, write up the event in the club newsletter or annual report. Recognize top volunteers at the club's year end celebration. The sign-up sheets and notes you took will help you give credit where credit is due. Keep good records. This information will help in planning the next event, and can be used to show the club's commitment.
Grant applications are stronger when they demonstrate a track record of volunteer projects.
Please share this information with IMBA, which tallies the trailwork hours and miles opened to build credibility for all mountain bicyclsts. One last thing Don't take it too seriously. Remember to have fun, keep it interesting, and help others make a difference.