Always good idea to have GPS, maps and a general idea of where on the Disney property you are going. The very first time we went to Disney years ago, it was VERY confusing that you had to know Contemporary/Poly were considered part of "Magic Kingdom Resorts" which was the freeway sign instead of a specific sign for the actual resort. We had NO idea we needed to know that and took the wrong freeway exit. Once you have gone there a number of times, it is easier to get around when you have a general sense of where things are.
Also good to know that over the years, Disney has redesigned some of the freeway exits/ramps, so expect a few surprises if it has been a few years since you were last there. The biggest problem regardless of time of day is when there is traffic on the freeway, you need to plan ahead to be in the correct lane for wherever you are going. We always have had a car and realize that sometimes we will take the wrong exit regardless of how many times we have been to Disney.
