I might be able to see him soon and I'd like to know what I'm in for.

What you're in for is a great time! Below is a setlist that Hank posted from the 9/30 show in Bennington, Vt. This is probably close to what you'll hear, unless he feels like playing something else, or is playing with a symphony orchestra, etc.

Chilling of the Evening
St. James Infirmary
Darkest Hour
Haliewa Farewell
The Motorcycle Song ("Alice's LP version")
Coming Into Los Angeles (on the Gibson guitar)
Green, Green Rocky Road

Alice's Restaurant
When A Soldier Makes It Home
In Times Like These
St. Louis Tickle (Piano)
City of New Orleans (Piano)
This Land Is Your Land (on the Gibson guitar)

My Peace (on the Martin 12-string guitar)

You'll find more setlists and discussions about Arlo's shows if you go (on the left, gray buttons) to Forums and then look for one called "Setlists and Show Reports." Have fun!

If you get really lucky you might hear Popular Demand. It's a great fairly new song(2003?).

http://www.youtube.com/watch?v=lpLm4sVgYrI

That is a great song. You'll want to hear that one live. Thanks to Goofus for the video link...