First how long is awhile? Glass would be better for long aging but I haven't seen any studies that say BB can't be used for long aging nor that they can. Most don't want to take chances with there beer so won't risk it. It all comes down to what you can afford, bulk aging would be best but if you don't want to take a chance with BB then bottle and age it.
Primary 1 - Smash 1
Primary 2 - Smash 2
Primary 3 - Belgium Triple
Bottled - Oatmeal Stout, ESB, Belgium Light.