Unfortunately I do not think that the 084/alaskan combination is good for cutting 1 by's as I lose about half an inch per pass... However, it is good incentive to start looking at a bandsaw mill ..... It is good to hear that the wood is stable. I have seen a door made from these wide slabs that has been carved by a traditional Haida carver, a truly awesome piece, even when it is weathered, it maintains an incredible beauty. How are you milling the cedar that you have?
This may sound kind of odd but I use my 365 with a 28" bar for my mobile setup often on very large logs and my 088 with 36" bar on my track mill mostly for cutting 1x8 and 2x6 for building projects. The 365 is much easier to pack into remote locations although if packing the saw and gear in gets to hard then packing out slabs is out of the question. I think that cutting free cedar logs into siding boards is well worth it. You would likely have a hard time to paying less than $1000 per 1000 board feet for cedar. Although I am not sure I would cut the prime but logs into siding? Move up the tree and then there is lots of siding.
first pic is of track mill
second pic is of mobile mill