Educate me a little - what harm will it do to pull it wil the drive shaft turning in neutral? What is the difference between it turning free and turning under power?
The reason I want to tow it is to save the jeep a little and to be able to keep up with everyone else on the highway.
what he's saying is that it could lock the front and rear driveshafts together (front and rear outputs of the t-case) when in neutral and in that case since there is no diff in the t-case it can hurt the internals (chain and such) due to different travel distance between front and rear axles. I don't know if that is the case with your NP231 but if it is then it makes sense to avoid that. Now, if you pull the rear driveshaft off the rear axle pinion yoke and put the t-case in neutral and in fact will lock the front and rear outputs together then you need to completely remove the rear d/s to avoid spinning it (so you can't just tie it up there under the Jeep) unless you have a front axle passanger side vac disconnect (not the 1 piece) - that can be a problem if you don't have an SYE as the oil will come out of the rear of the t-case.
if you have a pass axle disconnect then is not really a problem and t-case in neutral is fine unless you don't have an open diff (or selectable) in the front (like he said if you have a locker).
I have a 231 in my garage and I can test the locking theory but I'm sure oldjeep been thru this before - just in case you want a second confirmation on it (it never crossed my mind so i'll probably do it anyway but from what i remember the way the shifting collar works it does make sense now).