We have been saving up for out family trip to WDW. This is more than likely our once and only family trip to Orlando. We are staying 9 nights onsight at WDW, but we are looking to to a couple of "other things" while we are in the Orlando area. We do plan on traveling to Sea World for one day. Is it worth our time to travel to US/IOA for a day? If so, should we try to do bothparks in the same day? Or should we do only one and if so which would be better to go to? We are coming to Florida on May 24 and leaving June 2.