I had my LO in the evening and told everyone the hospital didn't allow visitors before 9 AM. Had I had any sleep the three days before my c/s, I would have been fine much sooner.
The only thing is you might still be restricted to the bed at that point.
This. I would also think it would be fine to have the 2 and 4 year old come see you, and this could be different between a RCS and a CS that was after 10 hours of labor, but I know I looked HORRIBLE the night of the CS. I was tired, I couldn't get out of bed, I had my catheter in, etc. My SIL told me that my 4 year old nephew was kind of scared for me and that he was scared when his mom would be having his sister that she would also look like I did. That would be my only hesitation in when I would want my other LO's coming to see me. However, I had my cs at 3:30pm and didn't get to my regular room until 6:30pm so maybe if I had some more time to rest I wouldn't have looked so rough.