If you have a car and are using it to move things between resorts, take advantage of bell services. You may spend $20-$30 in tips, but trust me -- it'll make your attitude so much better. Ignore this tip at your own peril -- moving things down the long walkways and hallways on your own can kill a vacation.
On the day of the hop, we sleep in and get out of the old room around 10:00. We reserve the latest breakfast possible at a nice restaurant like BOMA, Wispering Canyon, or Chef Mickey's, which is usually about 10:45 or so and make that a brunch. If it's a low crowd time of the year and the hotels aren't full, we'll go to our hop hotel right after brunch, because the earlier you get there, the more accomodating they'll be on room preferences at check in. Also gives you a better chance at a free room upgrade. Usually they'll have a room ready even though you're way ahead of the check-in time. Don't always count on them having a room ready to go though. After years of doing it, I've developed a feel for when the best time to check-in is going to be. Depends on time of year, day of the week, crowd levels, airline arrivals (weather and delays), and hotel choice.
If it's during a more crowded time, we'll go to the parks after brunch and then check into the new hotel around 5:00-6:00. This is usually a good time because it's after the afternoon check-in rush, but before the evening check-in rush after dinner and when lots of flights are arriving.