Are those the yellow ones, Koa? I just put those on my small log arch. They're heavier than the regular inflatables but worth the extra weight. Like you said, there's nothing worse than needing a wheeled device just to find the wheel flat. I carry a bike pump in the truck, but when you hit the tire with the chainsaw, the bike pump really isn't much help. I don't know how the non-deflatables will handle that, but I'm certain I'll find out some time in the future.
I know what you mean about the weight of the heavy cart. If it's too cumbersome to put on and off the truck, it tends to not get used many of the times it should be.
I like this thread. If it saves wear and tear on the turf, there's a good chance it will save wear and tear on the manpower, increase your efficiency and be making you more money with less effort. This should be a central theme in every treeman's operation.