Another vote for Sanaa. After lunch, you can take the shuttle or short walk to main lodge, and tour around there, it’s worth visiting.
We take a midday rest each day, nap and/or swim at our hotel. But in the past we have made AK the exception, staying all day, then dinner at Sanaa or elsewhere.
With additional rides @AK now, we may do the break there as well. It always seems far away from our hotel, more than the other parks, but really doesn’t take that much longer on the bus.