I wouldn't worry too much about the school's bar passage rate. These rates have more to do with individual test takers than with particular institutions as a whole. There's a positive correlation between LSAT/UGPA numbers and bar passage rates. The ugly truth is a good number of folks at lower-tiered schools have no business being there in the first place. They just simply lack the cognitive firepower needed in a legal practitioner. Some may struggle through law school and ultimately graduate with a degree. But they stand very little chance of passing the bar. If these students found covering a semester's worth of subject matter in a single test difficult, just wait until they're faced with one test covering the combined material from all three years of law school plus additional material that wasn't covered in school. However, as long as you have the intellectual prowess needed to pass the bar, it matters very little which ABA-accredited school you attend (that is, from a bar passage perspective; a school's reputation on job prospects is a whole other ball of wax).
One caveat, however, is if the school's bar passage rate drops below a certain percentage for a given period of time, the ABA could revoke its accreditation. This would certainly affect you.