I-75 northbound is open. You will be fine taking that road as long as there isn't a broken down car, which can back up traffic. Northbound at rush hour will be fine until you get on the other side of down town Detroit. Then it will be slower going but manageable.
I275 going North at that time of the day isn't going to be any better. But it is a reasonable alternative then going through downtown Detroit. It's really 6 of one; half dozen of the other.
Coming home you will really want to consider a non-rush hour trip through the Detroit Metro area, going southbound through downtowns would be a real challenge from Utica/Ray Center area. I696 to I275 is most likely the better choice going southbound; although it will definitely be considerably more miles, it's probably 30 minutes better time wise at rush hour.
I'm not sure if it was a one time thing or not; but I696 westbound was closed in the Van Dyke area last time I was through there about 2 weeks ago. If it is still closed that will make the trip home a real fiasco. I94 in either direction through Detroit at rush hour is stop and go a lot of the time.
