NP means not participating, but that is the default setting.
If their CRIP location says "N/A" and date updated says "9/9/9999," then the program just didn't get their paperwork in yet. I'd imagine they'll update soon, but programs that have routinely done CRIP in the past will very likely be attending it again. Call the programs in a few months and ask where/when their interviews will be held if they haven't updated and you need to buy CRIP hotel + plane tickets.
However, if a program's CRIP location says "No" and date updated is this year (ie DeKalb Medical center in GA), then they have chosen not to interview at CRIPS. As mentioned, some programs conduct interviews at their hospital or just use the clerkship as the interview and select all residents from among their clerks.
As Podfather said, CASPR is the match... all programs participate.
CRIP is the centralized interviews... most do, some choose not to.