So if its first come first serve what time would you have to be there to get a spot ?

Office opens at 7 am. It all depends on the day. Weekends get packed quickly. Holiday weekends even faster. A lot of people will come on Thursday night to get the spot they want.

Weekends can get packed but during the week its slow

just depends on what spot you want, went there last weekdm for mothers day and it was packed