Will my Big Sister give me a ride to the DLV activities?
DLV volunteers are not required to give rides to other attendees and if they do, it's a private arrangement between driver and rider and it's not considered part of their "official duties" as DLV volunteers.
If the two of you agree upon it, yes, it can happen, but it's not guaranteed, and if it does, accept the ride only under the condition that it's at your own risk for anything unfortunate or unexpected which happens in the course of that ride.
Also please keep in mind that many DLV attendees will not be driving a vehicle during the event for any of several reasons. Such things as shared taxi rides are possible if all involved agree.
Next FAQ entry (9.06): What if I get "stuck" in my hotel room or motor vehicle?