Skip the trailer, do a seatpost rack.
The advantages of a seatpost rack are many.
Of course, they work with disk brakes and rear supension.
They also put the panniers higher, behind you body and legs for better aerodynamics and better ground and heel clearance. And, it should do better in a crash.

Use it with a cheap, heavy aluminum seat post, don't use a "crabon" seat post.

The one I use made by Axiom.