It is in the morning, not midnight.
The trick is to see what is available, look at the pictures and description and decide if it is for you. Have alternatives as well.
Once you put in a site to the reservation spot, that site is assigned to you, giving you time to arrange payment. I think that you have 10, 15, or 20 minutes.
Often, spots get assigned, but then the reservation does not actually get paid for, so they become available after that 10,15, or 20 minutes expires. It's worth trying again if you don't get it right.
