All tours are initially scheduled simultaneously, to give as many options as possible. However, once a particular tour is booked, all other tours scheduled for that date and time are removed from the calendar. I am a local, small, veteran owned, one person tour company and I am booked almost everyday, so don't think about it, just book it! Be sure you don't miss out on your tour!
If you don't see availability for your desired date/time, just give me a call or email me, and perhaps I can work something out. I have magic like that!