We're planning a trip to the Pacific Northwest this summer. We will be driving from Michigan to Montana to visit family, then head to Glacier National Park, Washington, Oregon, national parks in northern CA. We're trying to figure out if it's at all reasonable, and if we have time, to actually make the drive down to Disneyland. How complicated is a Disneyland visit? How much would we need to plan in advance? What would be the best time during the summer to visit, and are there days of the week that are better than others. Thanks so much for putting up with all the newbie questions!!