My wife and I will be traveling with 4 other adults who are in their upper 70's.  One has a bad knee and may or may not need a wheel chair but all of them move slowly and since Hatfield is such a big airport we need help getting them to the curb where I will be picking them up after I pick up the van I have rented.  Do you have one of those carts that they can sit on to move them about?