The distance between Orlando and Tampa is about 90 miles. I would imagine using Uber would cost you a fortune not to mention having to leave Orlando very early to get to your ship on time. I would be worried about car trouble or heavy traffic, or whatever and not making it to Tampa for the cruise. I don’t know how much renting a car would be, but it seems like it would be the same problem. Also then you have to get from Tampa back to Orlando in time for your flight after the cruise. I’d be a nervous wreck. If it were me, I’d fly in and out of Tampa, your cruise isn’t until December so airline prices may drop.