Curious if anyone has any experience/insight that might be useful for my situation:

Booked parking at the SFO Long Term Garages/Lot for this coming weekend back in February, when the rates were a lot cheaper. Unfortunately, the airline changed our flights multiple times, and so we need to arrive at the airportmore than four hours before the scheduled start of our reservation.

Does anyone happen to know whether we'll still be able to enter the gates, or if it won't let us in until four hours before the scheduled start time? Relatedly, any idea on how they would charge us for the extra hours upon our exit? For example, would they recalculate everything at the drive-up rate?

I suspect we're in a bit of a unique situation, but any thoughts would be appreciated. I know I could always amend the reservation, but the cost is almost 50% more since I can't keep the same rate that I booked under.