I put the balancing question to several freinds of mine that race cars for a hobby These were serious type of hobbyists...have a six car shop dedicated to the hobby. These are Road America cars in three different classes. I regard these guys as neutral about AS, they rent me storage space and have looked over my AS and the Henschlen axels I recieved a couple of weeks ago.
All three thought balancing would be a worthwhile endeavor. While the trailer will funtion well without the balancing, the trailer will have a lot less vibration if the running gear is balanced. Less vibration means less separation of riveted parts and a longer life. None had an opinion about rear end separation but said vibration could certainly add to or agrivate such a condition. One of them even mentioned that he would mark the wheel and a bolt to insure the wheel is replaced the same way it is run (in the event of removal for a flat). His brother said a rebalancing the whole package, when replacing tires would not be a bad idea either.
It was pointed out that the AS is a C channel frame and heavy cargo trailers are built differently, often with I frames. These are evidently apples and oranges for comparison.
For my money I will be taking Andy's advice. For a relatively small expense this could prolong the life of the trailer and cut a lot of other maintenance costs. After looking over my rig it was also mentioned that I had D tires on C rims and that I should not run the typical D pressures of 80 Lb.s, they said to get other advice but 50-60 should be about it. Too high of pressure puts the wheel at risk for deforming or in rare cases cracking.
When the Camel hits the road again (next year due to axels, plumbing and my schedule) it will have balanced running gear.
Andy, your advice was independently verified, when I mentioned that a dealer recomended doing the balancing, one of my freinds said "listen to that guy, he knows what he is talking about" Thanks Andy