To take a stab at your second question, we can probably assume attendance would be somewhere between the UHL and AHL ranges, and well above FPHL.
In 38 AHL seasons, Binghamton averaged about 3,800, with the Rangers and Senators affiliations being around 4,000. From being an STH for many of these years, these numbers appear to match the actual crowds.
The Icemen claimed 2,900 over their five years. I only went to two games, both in their first season, and from what I saw then, that number may be a bit inflated. But mid 2’s is probably not too much of a stretch.
The FPHL is claiming a similar average so far this season, but it looks like there is quite a bit more padding based on what we are seeing. But let’s give them the benefit of the doubt and perhaps assume that a non-pandemic average would settle in the high 1,000’s if they are actually getting 1,200 right now.
So, given this, my best guess is that the ECHL would draw somewhere in the low to mid-3,000’s, with some variations based on team performance. Looking at the current league attendances, they would rank in the low teens.