How about a commemorative cloisonné lapel pin? This would be another way to discretely identify XMTS members.
Many groups and organizations such as the Boy Scouts use these to commemorate events.
There is a good selection of companies that take custom work such as this.

The decommissioning of the XMTSAS Saltire may be a good decision that creates a bad feeling. Posting the flight log may not do much to change this.

I personally would rather blame this on the TSA.

Remember: statistically speaking, the airship is still one of the safest forms of long distance travel there is.