We loved the Dole Plantation. After only stopping for a Dole Whip back in 2005 on our honeymoon then continuing on a tour, we decided in 2015 that we'd hang out there for a bit with kids then 8 & 6. They LOVED the maze. Hubby and I also had fun in the maze - great souvenir - the maze sheets. It truly is spectacular. Traffic there took a lot longer than all our GPS/Nav systems told us it would - the times kept creeping up as we were driving. Lots of local roads, single lane roads, army (? - sorry, not sure if navy/air force, etc.) bases with loads of traffic. Making a left turn out of the Dole Plantation afterwards, seriously took like 5-7 minutes.
The train was super cute, informative. We were there after harvest, so there was nothing to look at in the fields. We were unexpectedly there for about 4-5 hours easily. The gift shop has a LOT of good stuff, and not terribly expensive, compared to what we had seen the previous 10 days. They had a lot of unique stuff I was excited to get - holiday ornaments personalized, a pineapple cookie cutter, Dole pineapple chapstick. Just super fun, kitschy stuff. We probably spent 1/2 hour in the gift shop alone. We got our Dole Whips - no wait. BUT, had we been there 10 minutes later, there were 2 buses of people, it looked like the line would easily take 1/2 hour to get through.
So, Dole Plantation HUGE thumbs up, just be prepared for it to take more time than you think.