Yes you can book your dolphin encounter or swim independently. But be careful of the times as they post CST times and if your ship is on EST (Tampa port or Florida port) then you'll have to adjust the times. We booked a 3:00pm dolphin encounter and when I got the reservation realized it was 3pm CST(4pm EST) and our ship would be on EST. We have to be back to our ship by 4:30 EST (5pm departure) so we wouldn't make it. So we had to cancel our reservation.