We plan on hitting Epcot at opening, stay there for a while then head to Chief Mickey's for a 11:10 PS. Later, we have a 5:00 PS for Garden Grill. We will be eating a light breakfast in our cabin. Do we need to do Mission Space first thing? Would it be better to do mid afternoon? Don't want to make it too close to our meals. Kinda nervouse about riding MS but have to just once.