The USAF has only two active wings of B-52s - 2nd Bomber Wing at Barksdale and 5th Bomber Wing at Minot.
I'm going to guess that there are only about 100 Buffs H models in the active inventory...
Time to go looky look. :-0) ...
Even less than 100, and according GlobalSecurity.org, we have 76 Buffs in service:
"... To address this issue, the Air Force will add five additional B-52 attrition reserve aircraft, bringing the B-52 total from 71 to 76 for a total bomber force of 190. The B-52 fleet will remain the same with 44 combat-coded aircraft. ...."
Only 44 "combat-coded" ?
I thought there was a wing at Grand Forks, too.