I stumbled across this review while I was trying to find an arrangement of You Dream Flat Tires for my daughter's high school jazz band. The link is http://www.bbc.co.uk/music/classicpop/reviews/jonimitchell_travelogue.shtml
One insightful excerpt: One look at the musicians on offer here - Herbie Hancock, Wayne Shorter, Billy Preston, Billy Blades - gives one a distinct message: this is not music for idiots. This turns out to be both the album's strength and weakness. For all of her heavy friends, Travelogue can make for some heavy going. As on the previous Both Sides Now, Joni pitches her wonderfully matured (as in a fine wine) voice against an orchestra and becomes an interpretive singer; but this time of her own work. From Song To A Seagull all the way to Turbulent Indigo, songs are re-tooled and re-contextualized. Ron