Although the sessions can be useful and expensive why not get a superball or lacrosse ball and do it yourself on the floor or against a wall.
Trigger point therapy works best if done at least 3 times a day (small doses). You may have the greatest therapist in the world but only you can feel the points where it is needed most on your body. In addition you will need to maintain these muscles if you continue to play golf or exercise.
Use the ball for 5 minutes before you play and later after you play when the muscles tighten up. I recommend rubbing over a sore spot (Trigger point) a minimum of 12 reps before moving on to the next trigger point.