She may not feed during the MI but as long as she was at a good weight before laying she has enough fat on her to forego food. Putting a live rodent in with eggs may cause issues, so I'd say hold off personally.

Moss is a good idea, and if you had known this was coming preparing a box slightly bigger than her and the clutch would've been great so you can use the concept of a moist hide for MI as well to maintain humidity. Just ring the moss around her as much as you can without bugging her, keep it damp but avoid getting the eggs wet.

Given the circumstance you're in right now, all I can think to do is keep a close eye on her humidity and heat (she laid where she thinks best for the eggs so make sure the temps stay where they're at) and sneak a probe in to check the egg temperature without bugging her as much as an IR thermometer would. That's all I've got.