Depends on the size of your group. A cab, or car service, will run you about $45 each way....probably $80 r/t. Or you can book the Mears shuttle for $20 pp, r/t. It does have to be booked the day before though. You can give them the time you want to leave and they will give you the time for pickup....they start pretty early. For your departure from US/IoA, you can either reserve the p/u time when you book, or you can call them a few hours before you want to leave. They will then give you the time to be at the bus stop. I've used it several times and it has worked out great.
Or, use a cab or car service. I wouldn't take the Lynx bus...it can be convoluted and take awhile.