One thing to note, and it sounds like you all realize this, but you do need your "ticket" to get into EPCOT to get to the monorail. I had a pretty funny experience last year on the way to MK (funny now,definitely NOT funny then!). We were taking the boat to EPCOT to get on the monorail, and realized we'd forgotten the passes. Knowing they never ask when boarding trans, I told my DH that I would meet him at the gate to MK. He ran all the way back to the Dolphin to get the pasess and I was stuck with three preschoolers at the back gate to EPCOT with no ticket, no stroller AND no hotel key! I thought the monorail was outside the rear gate, since I hadn't been there for 10 years. It took me about an hour and a half to get to MK! We called it our planes, trains and automobiles day, since I had to eventually use every mode of trans available to get to MK!!! The kids kept saying, "we're NEVER going to get there!" and "I thought Disney World was FUN! This is AWFUL!" By the time we got to MK, it was nap time!
So, long story short,don't forget those passes!