A bubble for football is prohibitively expensive and impractical, which is why the NFL also isn’t doing it. Consider that a bubble for AAC Football requires all of the following:
(1) Housing and food for roughly 1100 student-athletes, plus coaching and training staffs
(2) Practice facilities and weight rooms for 11 teams
(3) Playing fields that can accommodate the volume of games being played. Assuming the games are televised, practice fields aren’t sufficient for this.
Any of the public schools in the conference probably has or can get the first one, but none of them have the second, and most probably aren’t prepared for the third if any two games are to be played simultaneously. The easiest solution is probably to find a large school district that’s online for the fall and use their facilities, but that means housing players in a residential area and it dramatically drives up the cost. Ultimately, there’s just not really a good way to do it.