Ahoy, Amy!
Our family typically travels in two staterooms. Since our reservations are linked together, as long as both cabins are paid in full, you will be able to book for everyone in your party. It does not matter that your husband is a cruise newbie, he is included in your party.
So, yes, you will be able to book your port adventures, spa appointments, and adult-exclusive dining for you and your husband at your 90 day window, he won't have to wait. Please keep in mind that the booking window opens at midnight Eastern Standard Time, which is lucky for you! You don't even need to plan to stay up late.
If your cruise itinerary includes a day at sea, I highly recommend booking brunch at Palo or Remy, the
adult-exclusive restaurants. I don't like to miss any of the main dining rooms for dinner, so being able to go to brunch at Palo is such a treat for me! Do not miss the grape and gorgonzola pizza and the chocolate covered strawberries, they are to die for!
I hope this helps with your cruise planning! Please let us know if we can answer other questions about your cruise as it gets closer.
Happy Cruising, Tracy V.