Since we have moved, we are not able to go to the DLR as often as we used to, but something that your husband might enjoy (if it is still available) is a ride on the Lilly Belle car on the DLRR. If they still do it, go to the train station first thing and ask the conductors if any rides are available.
Also, I understand that the exhibit at the Ronald Reagan Library is fantastic and definitely for a mega fan. We're hoping to check it out whenever we're in the area again.
Newport Beach and Laguna Beach are both charming beach towns and we always enjoyed eating at Ruby's located at the end of a pier in Newport Beach...there's an outdoor seating area upstairs that provides amazing views of the ocean.
I'm sure you will have an amazing time no matter where you end up going!