My Wanderings are living as a trio in a 55 gallon tank. (12" x 48" base)
My Pickerings are living as a pair in a 40 Long tank. (also 12" x 48" base)
I solve the feeding dangers by either watching them eat with the lid off so I can intervene if someone gets grabbed during feeding excitement... OR... and I like this better ... I have taught them to take food from feeding forceps, so that each snake is HAND fed every item.
Not that I am spoiling them!