We usually leave around 12:30 or 1:00 and return around 4:00. My kids are a little older though. We sometime leave MK right after the parade and then come back a little later depending on how late the park is open.
We did the same thing last trip and for this one, we'll be doing something similar. My son is 5-1/2 and does not nap, but a daily break for the pool is definitely needed (and we're off site, with a rental car). He cannot go non-stop and he loves pools and this is a vacation and not a death march.
Our schedule includes rest times every day except for one.
Day 1 MK: Arrive before rope drop and stay until after the 3 PM parade (never saw it) -- relax at resort, quick dinner, then 8:30 PM arrival at Contemporary for Pirates and Pals Fireworks Cruise
Day 2 EPCOT: Sleep in after late night, arrive at EPCOT somewhere between 2-3 PM and probably stay until Illuminations.
Day 3 AK/HS: 8:15 ADR at Tusker House, stay at AK until noon, relax at resort pool, arrive at HS no later than 3 PM. 5:20 ADR at 50s Primetime and will book FP+ at HS, staying for Fantasmic!
Day 4 HS/MK: We'll be at HS early and have an ADR for the Star Wars breakfast, plan to leave HS no later than 1 PM. We'll do FP+ at MK in the evening, stay for MSEP, and eat QS there. Arrive no later than 4 PM.
Day 5 AK: Not hopping this day. Will arrive at AK in the mid morning and I hope the animals at the safari are active still at 10:30 or 11 AM. Staying through dinner - ADR at 5:15 PM.
Day 6 HS/MK: Our last day. 8:05 AM ADR at H&V and we'll stay for a few hours for whatever we've missed. We'll relax at resort pool and arrive at MK no later than 3 PM. Have 5 PM dinner ADR and will stay until we're done. FP+ at MK.