I understand that C/C plates adjust castor and camber, but I really have no experience to tell me what exactly that would do for me. I am saving up for a Bilstein BTS kit (shocks and struts with some matched springs) and I was wondering how important C/C plates would actually be. I will eventually get them for sure, but would the in between time be bad or damaging in some way?

You really should get them and have a shop do it or like me install and drive straight to alignment shop!!