We're going to be there 2/4 through 2/8 also. I'm anticipating very light crowds - I called just yesterday to make a PS for dinner at the California Grill on Friday the 6th and found several open times that would put us eating during the MK fireworks. I never expected to actually be able to get that time on this little notice!
I know there will be a group of people attending the This Is Love merchandising event at the MK on Wednesday night, the 4th, but that should be a relatively small group and should have no effect on crowds. At this point Disney hasn't announced which hotel will be the "host" hotel for the event.
Linda