As someone that was intimately involved in setting up an ITCC AND helping with ISA International in Providence 2009, I can say that it is WAAAAY too much put on one small chapter to try to facilitate both of these things at the same time. ISA provides help, but it is incumbent on the regional chapter to ready so many things it is nearly impossible. Not placing blame, although I think if the goal was to keep them together, ISA could put more resources behind it and make it happen, but in reality, the split allows for much more concentrated planning efforts, and will be a good thing for the chapters. I don't believe that separating ITCC alienates non-climbing arborists, as there are so many opportunities to view practices (on floor workshops, climbers corner tree, etc.), but perhaps with the separation, ISA should encourage everyone to tour the trade show more widely, and perhaps look for more speakers that can dovetail different parts of our industry, with CEU's for all kinds of arborists available at as many talks as possible. I also ran a local conference as president, and I found this to be the most challenging and rewarding part of building a conference.
Tom