To be very honest with you, the answer would be yes, you really do need Facebook to "do" the challenge it is all done on FB. Every day of the 30 day challenge. Tyler hops on Monday-Friday night at 7pm MST to answer questions live of any struggles you may be experiencing.

We have several "high profile" people who want to remain anonymous therefore they have created fake/pseudonym FB accounts (judges, lawyers, doctors etc). That has seemed to work for them. Something you might want to consider.
I don't know your personal reasons for not wanting to be on face book, but I can tell you this, Tyler closely monitors the pages something fierce and he won't allow drama! It is a positive and very encouraging group. You will really enjoy the pages and will gain tons of encouragement from being a part of the community.