We stopped in Miami this morning, since we have not hit a foreign port we just showed our cruise card and walked off. Some form of transit is needed to get anywhere. I didn't feel like dealing with Uber( I live in the middle of nowhere and don't use it) so we took a taxi to Bayside marketplace for 20 bucks.
I'm on for the first time at the same time as you so I've really been wondering this myself. It's the only stop I'm looking forward to, I'd be bummed. I know it can't be helped sometimes but I hope we don't have to skip it