The other thing about just leaving it on and recording everything is that on MD it is so easy to edit the rubbish out afterwards.

I'd go for mono, but that's partly because I have a Sony MZR30 that pre-dates MDLP, also in a typical field situation you probably can't set up a good stereo sound stage anyway: I always use a mono mic. And with mono you get better sound than LP (though you might be pushed to hear the difference).

Anahata