Thanks for all your input on the configurations I'm attempting to pull together for my upcoming trip. Last night I was trying to see if I could find examples of people using a monochrome camera + EFW with wide field camera lenses. In addition to bringing my ZS61 (assuming I can get that all to work), I was going to also consider bringing some Rokinon wide field lenses 14, 24mm, but I'm not finding examples of people using these with a monochrome camera and EFW and my thought is that given they are so wide that maybe stacking and integration frames across different filters just doesn't turn out well for some reason. I was thinking of maybe getting an Rokinon 84mm / 1.4 lens that would give me more local length as an intermediate option between those wider lenses and the ZenithStar 61. I do have what I need to attach the Rokinon lenses to the ASI294MM-Pro.
My final configuration would be to to just take my Nikon camera, but it's not Ha modified which is why I really want to try the ASI294MM-Pro.