I've done it since the 2pm hopping has started but not on purpose and not with any goal in mind. Just got finished with what I wanted to do in each park. I started at AK (I know you want to start at HS but AK closes the earliest). I went to MK from there, just on a whim, rode a ride or two and moved over to HS. Got something to eat there and rode a ride and walked over to Epcot because F&G was happening and I wanted something from the booths, ate rode a few rides and walked back to Dolphin where I was staying. All of it was just kind of well this park is too crowded or I'm really craving x at y.
For you plan, assuming you get a boarding group before 2, I'd leave HS and hop over to AK because it's going to close the earliest, then catch a bus to Epcot and stay in the front of the park, ride a quick ride like maybe Living with the Land and grab something from a booth if you are there during a festival, the monorail should be running between Epcot and MK then (I think it's supposed to be running now) and there you go. It is possible in normal times to watch the FWs at MK then hop to Epcot because it does stay open later than other parks (in the past). To start at HS I'd do my park reservation there, then keep an eye on park hours and adjust my plans from there, hopping to each park that closes earliest, etc.