I've used Happy Limo and will be using them again. I travel semi-often and I don't think I've ever had a car service find me someone to help with the bags - they put the bags up on the sidewalk and that's usually about it. With 3 adults, though, you could have one person find a skycap while the others stay with the bags. If there is room, you may get dropped off right by the outside baggage handlers, making it a non-issue if you use them.