Bass parts are generally easier to deal with than drum parts, but like a good drum part, less is usually more.
Bass players, like drummers, are interested in the style, the changes, and any specific notes that are required to fit in with the arrangement you have written.
Keep in mind that unless you are a bass player, you probably cannot build a walking bass line as good as a bass player will improvise naturally by looking at chord changes.
Be wary of notating too much information for a bass player – especially a good one. (If you doubt me on this, just imagine what Chick Corea writes out in the parts he passes out to John Pattituci. As little as possible I’ll bet!)
This video deals with how to write a bass part in a typical jazz big band or small group arrangement.