Laura,
If I may add a little more to what Stuart has given you. You said that your room will be open from noon to about 6am. I suggest that your schedule for floorpersons, cage, and dealers begin at 11:30am (30 minutes before opening). If you are using 8 hour shifts the shifts will run like this: 11:30 to 7:30 (I don't know what your lunch schedule will be like as far as regulations). You might need to extend the shift another 30 minutes. You and one floorperson should be enough to get you started. the next shift could run fron 6:30pm to 2:30am This will overlap the shifts one hour (you might want to overlap only 30 minutes). The next full time shift will begin at 10:30pm and run 30 minutes past closing until 6:30am. This is a way to use three full time shifts (8 hours) into a 19 hour schedule, (11:30am to 6;30am). I would rather have more dealers than not enough. If you need more help with scheduling the dealers let me know. I always tried to work the part time (or extra board) dealers into all of the essential duties, like spading the decks, and helping with players chips and fills. I don't know what your payroll will be like but, the dealers are usually the lowest paid by far, so it always made sense to maximize their use. Suggested shifts: 11:30am to 7:30pm (you and two floor)
6:30pm to 2:30am (two floor with you for 1 hour) I know you will stay longer.
10:30pm to 6:30am (Two floor until 2:30am and then one until closing)
Once you determine what your busiest times will be, you can always make adjustments. I was fortunate that I had an extra board of dealers that would be ready to come in and work on very short notice. I hope this helps.