No doubt one of the local Ziners will give you more specific advice but a
brief word from me re your Bologna accommodation.
My personal preference would be to stay in the historic centre of Bologna.
It is a city of such particular character that I like to be in the heart of
its activities, within walking distance of its cafes and restaurants and
markets, the galleries and central plaza, the churches and other historic
sites. As we always stay with friends when in the city, however, I can't
recommend an alternative hotel in the centro storico.
That said, I have looked at the website of the hotel you have chosen and it
does seem interesting. Obviously, it is outside the walls - but the
transport links sound as if they should be convenient. While it is in the
suburbs, it isn't a huge distance out - especially if you are not
accustomed to living in a downtown area. I guess that, for two days, even
the trips in and out will be part of the adventure. One drawback is that the
shops and public places do close in the middle of the day, and this may be a
problem in terms of what you with the family for those hours - other than
sampling all the superb Bolognese cuisine, of course.
Make sure you include a climb up the Tower in your schedule!
Best of luck,