Thanks for posting on the message board...
I recommend you bring your vehicle on the ferry with you... you will need to show up at the ferry landing at least one hour before the scheduled departure time in Anacortes. More than one hour if it is a busier weekend. The ferry landing in Anacortes has restaurants, coffee, picnic tables, and trails along the beach with scenic views of Mount Baker.
When you purchase tickets in Anacortes they are round-trip tickets... this means you only pay once in Anacortes and your ferry ride back to Anacortes from the islands is free. You just show up at the ferry landing and get in line. Your van passengers will be about $11 per person and the vehicle and driver will be about $50.
There are taxis and shuttles on both Orcas Island and San Juan Island however because you have such a large party and a limited amount of time having your own vehicle will give you maximum value of time and money.
Now you just need to decide which island to go to
Orcas Island with attractions such as
Eastsound Village and
Moran State Park .... or
San Juan Island with attractions such as
whale watch Park,
British and American camp,
Roche harbor Marina, and
Friday Harbor.
Please let me know if you have any other questions... see you in June!