I have seen the Top 50 lists and I know that posting the FIFO info might encourage books being pulled from shelves or discourage posting in the first place.... However, I'm trying to find good book club books and it's hard for me to decide what to choose because I need to request 10 copies. Is there any way to know that the title I choose won't just have one or two copies available, but will have enough for my readers?

If you add the book to your Reminder List, you will see how many copies are available.

I think the system is set up to let you only order one copy at a time.  You have to wait until the book is marked mailed before ordering the next copy.  Folks have worked around this in the teacher's forum by asking folks to order them copies to be shipped to an alternative address and then buddy a credit. 

You do lose the option to RWAP when a book is sent to a secondary address.

Thanks! This will help me plan for both adult and student book groups.

I think people have also gotten help with this from PBS.  You can try contacting them and asking them to let you order more than 1 copy.