I went to ERAU and they didn't have NROTC, only AROTC and AFROTC. I joined AFROTC for ONE day, went to a single leadlab and called the commander and cancelled all my appointments, uniform issue etc. I went BDCP and never looked back. DON'T join a ROTC program just to be competetive for BDCP. Just go straight to BDCP and make your app as good as it can be in the traditional ways (GPA, ASTB, LORs etc) and you'll be fine.
Good luck.