I shoot RAW and use Capture NX2 with my D700 and D4. I do minimal post processing except for the usual cropping and adjusting exposure and white balance. Sometime I will change color profile using Capture.
I normally shoot uncompressed 14 bits with my D4 and D700. Using my D4's 32 GB XQD card, I can get 872 RAW files which most of the time is more than I need and never thought of needing a 2nd XQD card.
This summer I will be taking a 2 weeks trip to Hawaii and a week trip to Kodiak, Alaska using only my D4. Should I shoot compressed 12 bit to get 1500 RAW files on my XQD card, which I think should be more than enough for each trip.