Although I haven't participated myself, the Asian Martial Arts Center in Fresno has a Daito Ryu study group on Saturdays. Although primarily a Shotokan/Kobudo/Kickboxing school, they periodically host Daito Ryu seminars and then practice on Saturdays.
Although my background is in Aikido, I trained at the Asian Martial Arts Center for Shotokan for a couple of years while traveling for business. I thought the sensei (Cho Sensei) was fantastic and really approached the teaching from a fundamental understanding perspective. I gained a lot of insights from him that helped me with my Aikido. Unfortunately, I no longer travel to Fresno, but I loved that dojo.