The way I handled it was just blocking out time as a break and noting that I would be meeting Stitch, or whoever. I used character locator (the website listed above) to check hours and tried to plan to arrive about 10 minutes before the meet started to minimize line-time.
Thanks all. Guess blocking out time is the best I can do. Was hoping for more Touring Plan’s style guidance such as which showtimes were busier than others but oh well.
Odd that it doesn’t handle these like it does more proper shows and greetings.