I'll preface this by saying: I have read touring plans, many of them, over the years. I understand that they all avoid EMH days like the plague when suggesting parks. Also, I refuse to "commando" tour.
That being said, hogwash to avoiding them, especially in slower weeks like yours (first week of April).
We love late-night EMH. Never miss it. Although, according to the touring plan writers, we should?
We also tend to travel in lower-attendance weeks, and by about an hour into those late EMH periods you are walking on rides.
Can't necessarily speak for early EMH, because in my 40-odd trips when they were available, I have taken up the offer exactly twice. I don't like getting up early on vacation.
I plan trips using EMH parks - even ones that had early EMH before we arrived - if that's where we want to go that day. I usually start the plan with the MK days - first full day, last full day, and maybe one in between, making sure to hit the late-EMH days there - and then plan a rotation accordingly to avoid the same park two days in a row. I have an AP, but the various folks who accompany me on these trips generally buy base tickets, no hopping (except my mom, who understands and willingly hops with me).
I sometimes, for fun, will compare my plans with the "suggested parks" lists - but I don't get too worried if they don't match up (they usually don't). That's part of the joy of traveling off-peak - there aren't as many crowd issues.