I've never known for there to be trouble or animosity at pre season friendlies. I very much doubt you would get any hassle if you were with your son even if it was a Euro tie.
Away fans reception at Parkhead is very much dependent on the visitors antics as oppose to our own. I think if you win the league you will be given a hero's welcome. Not to forget the Martin O'Neil and Neil Lennon connection between the clubs.
For a hotel anywhere in the city center is good for accommodation that way your in between the Airport and the ground. Jury's Inn in pretty central.