Depends on what kind of trip you are looking for. It will be busy, so there is a very real possibility that you will spend some (or a lot of) time in line. I think the touring plans give you direction and often are good for staying ahead of the crowds. I would have a pretty good plan and use it for as long as it works. If it gets too crowded or if an attraction has a really long line when you get there, be flexible. Also, if you have done your homework and know the "lay of the land", etc. you may be able to get by without a "formal" plan. It's those folks who do no planning that stand in lines all day and only see a couple of things and complain because they can't get into any restaurants because they have done no advance prep. Have a great trip whichever way you go.