This tune is an excerpt from Steve Kaufman's Band in a Book: Bluegrass Vocals (MB20425BCD). This book includes all the parts for lead and rhythm guitar, banjo, mandolin, fiddle, and bass. This is a great resource and way to get a Bluegrass band up and running in no time.
We have posted the same song in their respective webzines, be sure to visit all of them to get all the parts for this tune.
Bass: You have some very good connecting bass walks in this arrangement. Memorize where the walks originate and where they end. Remember the chords they are used for. You will start to see a pattern in later songs.