The portages on this trip were all in perfect shape, so someone has definitely cleared them since you were through. I don't remember a single blow down. 

Speaking of Big Thunder, I took a decent look at the sole campsite there (from the water, I didn't actually get out and explore) and my impression was that it would be a really nice spot to set up camp on for a couple days. I may just do that one of these years. 

I've camped on Erables before but not Maple, so that's where I chose it this time. The campsite I had on Maples was about as close to perfect as it gets - with the exception of needing an easier take out!