Family of 5 and we were the only ones on the boat in Oct. 2000, had the special birthday cruise package..it was great since we were under the International bridge (?) and the Cpt. got the whole crowd, waiting for the show, to sing happy birthday to my then 8 year old while we were underneath them..PRICELESS !!!
On one cruise the captain did something very special for our grandchild; so, we tipped accordingly. Most of the time $35 to $40 should cover a pretty filled up boat.