Yep. You may end up hating me (all of us) for this if it doesn't turn out like it usually does

! But I truly believe that EE is the best touring "tool" Disney makes available. There are just so many people who don't want to get up early. (I certainly empathize!) EE allows those people who are able and willing to use those early mornings to our advantage.
A few tips about using EE:
Try to eat a small breakfast before you leave your resort. (We usually have cereal and a small milk with us in an ice chest, but we have also eaten pop tarts or even blueberry muffins when we're staying somewhere with a nice bakery (like the BoardWalk). That way you don't have to worry about food once you get in the park. (Last time we were there, we ate cereal before we left for MK, rode everything we wanted to ride by park opening, and then got a cinnamon roll at the bakery on Main Street and sat and watched the "park opening" show.
If you're staying at a resort with bus service to the MK, get out to the bus stop early. If EE starts at 8:00 a.m., get out to the bus stop as close to 7:00 as humanly possible. (They usually run a bus about 7:05 - 7:15 and then the next one can be a little late -- too close to EE opening for my comfort.)
If you're going to do anything in Fantasy Land, go there first. We have, in the past, gone straight for Dumbo (and done it twice in a row!) and then headed over to Tomorrowland. If you have children who insist on doing Tomorrowland Speedway, do it second. (That line -- in the sun and always a nasty bottleneck! I can't wait until my DS doesn't care about that ride anymore!) Everything else comes next. (Usually Space Mountain for us and then Astro Orbiters.) If you don't want to do Fantasy Land, go straight to Tomorrowland for Space Mountain, etc.
Towards the end of EE, go back over to Fantasy Land and wait to head for Frontier Land. Then you can be early to get on Big Thunder Mountain and go on or get FastPasses for Splash Mountain.

This sounds like I'm a real commando tour-type, and that's funny because we really take relaxing trips to WDW. It's just that my whole family (DS 8, DH, and I) loves MK, but DS and DH get apoplectic (sp?) about long lines. So I've worked long and hard over the years to determine how we can best enjoy MK without getting caught in bottlenecks. The above plan seems to work really well for MK, at least. We don't find that we need to use EE for the other parks, but I imagine EE works well at those too. Good luck!
We'll be there, too!
Julie