Its not entirely true that any 4wd with a neutral can be flat towed. Even a 205 doesnt properly oil in neutral. In N, the rear output is all that is spinning in a 205. That rear gear isn't submersed in oil, so it wont really sling oil. You can lock the hubs and spin the front output which should then oil everything...but thats also similar to driving around in 4wd. Dana 300, etc are all the same scenario. Tons of people do it and get away with it however (myself included).
I tow mine 2-300 miles at a time, hubs unlocked, tcase in N. Whenever we stop, I start it and just let it sit there in gear with the case in N to sling some oil around. Havent had a failure yet. If I was going more than 2-300 miles, I would just spend the 5 minutes to pull the driveshafts at the axles, and strap them up.
-Jeff