...and depending on the size of the run groups...if small, they may be combined (novice/intermediate) and (advanced/intructor). This will give you much more track time.
I have run with PDA for 10+ years and have found they will increase your track time based on the attendance. Best run groups are on the afternoon sessions of the last day of the event....when people start heading home.
I have run all afternoon(!) in these sessions only coming in for fuel and cool downs.
