Omega speedmaster / Nasa crater photo box set 1969

Depends. There aren't many people alive who have walked on the moon. It's an opportunity to see and hear someone who has, which should make it somewhat surreal.

If you hope for a one on one encounter or a personal greeting, it could happen but is unlikely. You're going as part as a paying participant to a public event. I know a person here on the forum who went to a different event a few years ago and saw Duke walking in a hotel lobby completely alone, with no one recognizing him. My friend watched as all these people unknowingly walked by a moonwalk. So it's not impossible, but it is unlikely.

Duke is a good signer, which has the effect of making his autograph inexpensive and easy to come by. If your goal is to cash in on his signature, it's not worth it. But if your goal is to meet face to face for 15 seconds and look in the eye of a person who walked on the moon, then it's priceless. You'll be one of the thousands of forgettable fans to him. But it should be a memorable experience for you.

Seeing a moonwalker next to a giant Ark might not be inspiring, though.