I would do what works - use the frisbee! Why stop?
Elsie's tracking is coming along nicely, done a few 2 hour old tracks in very mixed terrain and she is working well. The two biggest issues at the moment are my confidence in her when we have a blind (no start peg) start, and recognizing when she gets distracted from the track by bunny smells (she gets all crazy and frantic and her tails quivers haha!) and get her back on the job quickly