First DSLR Shots
grey cards are generally used for WB correction when shooting in raw to get the WB as best as the camera can. if it seems to take out the warmth you are looking for, add it back in post. unfortunately warmth is not a setting on our cameras...so get the WB correct first and then we can try and add "warmth" later.
remember, these are just my opinions...do what feels right for you and process how you would like the pics to be seen.
Sure sure. Thanks for the input. I'll make a note to fix the white balance first and then try and add back the "warmth" I remember from when I took the shot.