Is there anyway you could go for part of it but not the whole thing? Or are you close enough that you can go back quickly if needed?
No way I would leave a baby that young for an overnight. Not even just a single night, much less four of them. They are way too little to be away from mom for that long.
Personally I wouldn’t be able to be away for so long. It’s normal to be uncomfortable being away from your baby. If you’re formula feeding it’s doable if you want to, but if you’re breastfeeding it might be pretty hard