I still haven't completely ruled out a trailer.
I ordered more touring specific panniers (Axiom Champlain and Lasalle), light sleeping bag and and air sleeping pad and already trimmed some weight. And I hope to do another two-day ride the following weekend. That'll leave me two more weekends to try a trailer if I have too. But I agree that it would be much better to fit everything in the panniers. However, I don't want to find myself in a situation that I wish I brought something that I haven't.
And yes, I didn't like the top-heavy feeling of the loaded bike. I imagine a trailer would make it more stable. I guess it's one of those things that one has to try to make a final decision.
On the other hand, a trailer would come handy to run errands as I'm trying to live as car-light as possible. Ideally, I'd build a Big Dummy, but that may have to wait. I may just pick up a $50 kid trailer for the heck of it and alter it a bit.