[NicknamedBob]

Before you go dragging the Flying Castle off at a respectable percentage of the speed of light, I'd recommend you work out an effective shield against micrometeorites.

We do pretty well at repairing the occasional ten kilometers per second object, but if that's going up by a factor of a thousand, we're gonna be in trouble.

[Dead Corpse]

The B-B field would zip us around pretty good, but would also set up a highly polarized -e field around us. Anything getting close would be vectored in, accelerated, and "equal but opposite" reactioned out the other end.

As for a tractor field, hooking us into a subspace grounding field would effectively put us out of phase with normal 4D space-time. No worries for anything smaller than planetary mass sized objects. For moons on up, we'd be able to use fluctuations in the field to ID planets "ahead of time", literally, by the ripples their gravitational footprint leaves in subspace. A bit like rafting on a river and spying the submerged rocks by the ripples in the surface.

Relax, I won't get us shredded by space junk. How embarrassing...