I feed around 70 snakes on the big feeding day and around 30 snakes on the "hatchling" feeding day. I stage it around doing other stuff and work in groups.
Myself personally, I don't feed on substrate. I feed mostly frozen-thawed and the aspen sticks to the prey more than I like, which results in snakes spending time trying to get the aspen out of their mouth after swallowing. I'm not fond of the problems with feeding them on aspen, as few and far between as they are...losing a unique hatchling to mouth rot from getting aspen jabbed into its jaw was enough by itself, let alone the risk of impaction or the larger ones that try to ingest the food and the paper towel it's on if you feed that way.
I thaw out what I need and have it on a paper-towel covered platter. I run through the stacks of boxes, pull out hatchling, pop it and its food into a gladware feeding box, clean the water bowl and substrate, put gladware and water bowl in box, mark "in shed" or "shed" check boxes on the feeding sheet, and move on to the next one. I then leave the stack of boxes with feeding boxes and snakes inside for an hour while I'm doing other things to give them time to partake. When I come back, I go through the boxes, unload a good snake (fed) or a scolded snake (didn't feed), and remove the feeding box, then mark a + or - on their feeding sheet in the "ate" column.
I've got 4 divisions of feedings, the shoeboxes (hatchlings), the medium boxes (yearlings), the large boxes (small adults), and the breeder boxes (large adults, breeding groups). Hatchlings and yearlings eat in gladware sandwhich containers. Adults eat in 9 inch deli cups. These fit nicely in their boxes so that I don't have to worry about anyone popping a top after they finish eating.
If I am really in a rush (rather than my usually drag it out all day process), I can feed in 4 or 5 hours (70 snakes). That's cage cleaning, water cleaning, feeding, and returning them to their shelves. That's also without a handy lidless rack system, so bear that in mind. Takes time to replace all those clippies to the lids.
