If you don't mind the walk, the DTD entrance. Everyone always recommended it but never explained why (at least that I could find) but i found out why our last trip when we stayed at GCH. The lines that are specific for on site guests don't even open the security option until 7:30am so if you're not the first person or the line is really long or slow, you'll spend 10-15 minutes of your EE doing that. The DTD opens much earlier and they even let you into the park before 7:30 so then you just have to go to the side where they have it for hotel guests and scan your hotel key and you're on your way within seconds of 7:30. Hopefully that makes sense. Oh and also, the Pixar Pier entrance only puts you into CA near the pier so if you want to enter the front for the full affect, best to do DTD.