Thanks very much for feedback.
I have a sway bar that I put on when needed, but it isn't on right now. I have the bearings lubricated once a year, I'll check their temperature first thing I go out. Anytime someone else does something there's a chance they screwed it up, the only reason I don't do it is that I know I wouldn't do a good job of it.
There's no fluid leaking from the suspension, I tightened everything down that could squeak and there is a chance that the noise is related to the steps on the trailer, especially if funny noises AREN'T associated with the suspension.
I've been very happy with our 171 but every-so-often it ups and bites me so I'm afraid I've gotten a tad paranoid, especially with the long trip coming up soon.
Again, thanks for the responses.