Complex sentence: He is also a member of Okkervil River (1999-present), although, due to touring conflicts between the two acts, he currently plays a limited role in Okkervil River outside of recording sessions.
Split into simpler sentences: He is also a member of Okkervil River (1999-present). Due to touring conflicts between the two acts, however, he currently plays a limited role in Okkervil River outside of recording sessions.