When should I bring in my Brugs? I live in a residential environment zone 7. Brugs are in pots still blooming and producing an occasional pod. Better to keep brugs in pots in an unheated garage? Or better to cut up viable branches and start in water vessels early spring?

Protect from frost. Whenever frost is predicted, bring it in.

Lisa it is tough call. You will lose the leaves if frost. You will lose whole plant over our winter if left out or in ground.
I have taken off 0ne good size branch and made three cuttings about 3 weeks ago, but other branches may yet bloom. I have two plants small enough to bring in the basement. But I don't expect them to thrive there. I always get spider mites on indoor brugs.
I have more success with fat cuttings than soft skinny tip cuttings.

These are Burgmansia at Augsburg Old Marketplace (right next the St.Anna church):





I've been seeing them for years now so I informed myself on how they are kept alive over the Winter.

They are overwintered as follow: they stop watering them in October unnless there's an unseasonal hot dry spell. When the first frosts hit (about now) they are left outside to trigger dormancy: mind these are not hard frosts as low temperatures very very rarely go below 30°F. The plant will start drop leaves like crazy and be completely naked in 7-10 days. At this point they simply move the potted Angel's trumpets inside the market warehouse (where temperatures never drop below 50°F or so) in a corner and cover them with tarpaulin. They are watered once a month to keep the soil just moist. In the Spring, after the last frosts have passed, they are simply brought outside and allowed to exit dormancy by their own.

As said these are pretty old plants, so they have gone through multiple dormancy cycles by now and as you can still they are still going very strong.

good to know! I can def do that with my two potted ones