My thoughts about whether Matt and Sweat are together come down to a couple of basic things. Did they get stuck hiding out someplace early on because of injury or being surrounded? If yes, they're probably still together.
If no, then my train of thought moves on to - who is the master manipulator here? Matt IMO. So would he not use every resource available to him, namely - Sweat? He would, IMO, use Sweat for anything and everything possible, then part ways, either killing him if necessary or leaving him behind if not. But I think he'd use him for anything he could first. And anything Sweat has to offer would probably be located down in the Binghamton area, IMO. I've never heard of him living or doing time anywhere else anyhow. So if Sweat had nothing to offer from the get-go, then probably they parted ways very early on, maybe upon leaving the manhole. Otherwise, I'd say focus more downstate.
On a completely different subject, there's no reason to think either man had any link to native american heritage or marriage, right? Because Israel Keyes was able to cross borders through reservations since he had been married to a part native and was therefor exempt from certain things like that.
And while speaking of Izzy, I believe it was cpaul who I was knocking the subject back and forth with in the first thread - he said that these guys would have needed to have put a cache of cash and weapons or something similar, or someone would hav ehad to, before they broke out in order for them not to be relying on criminal activity to sustain themselves now, and I replied that Izzy's Constable cabin was 39 miles west from Dannemora and that IK had made a habt of burying kill kits/ caches aroudn and about and of the number of them he'd confessed to stashing, I believe some are still unfound to this day. IIRC. Since he had ties to the military and tended to stash his stuff in or near military properties, usually bordering state land, and Matt had supposed military ties, this had gotten me to thinking about whether any of IK's stashes might be known to ANYONE else somehow... but I doubt Matt ever bumped into IK...
well that was a lot of rambling, sorry, this is what happens when there's no new news...
Also, for Tillie's character, I was thinking of Shirley Knight, perhaps reprising her role as Bea in Grandma's Boy.
"Space Shuttle!"
(probably nobody knows this movie and rightly so, it's terribly stupid humor, but I'm into that sometimes I guess, LOL.)