Have a look at what I've done for the first hike and tell me whether you think that's a good way to use the Garmin trace or let us know if you have any other suggestion...
A big difference between this site and Meetup is that we can continue to edit the descriptions of past events. So what I've done is inserted a screenshot of the Google map from the Garmin Connect site (grabbed using Fireshot) at the bottom of the description, and made it link to the full trace information on the Garmin page if you just click on the map.
In future when we rerun the hike you can just clone the old hike (see the Help for how to do this) and you'll instantly have a route map.
Does that work, or is there a better way you'd like to see it done?