The short answer is, the Wednesday and Thursday will be about half as crowded as the Monday and Tuesday when the park is open later.
Go here and read post #4.
June Crowds
Be VERY, VERY glad you're going Wed and Thur instead of Mon and Tue. Besides, if you leave at 9PM Wed, you can still get to bed early and be back to the park at 8AM* the next morning. Staying until 11 or midnight makes it so hard to get up, shower, eat, then be at the gates half hour before opening.
* Yes, the park opens at 9AM, not 8AM. However, anyday the park opens after 8AM, they actually open Main Street an hour before "opening". They throw a rope across the end fo Main Street to hold you there to shop and eat breakfast.
If the park opens at 8AM, you're held at the gate. This slows the rush to the first ride (better be Space Mt. to grab a FP, then ride).
The rush to the first ride is MUCH worse on rope drop days since you don't have the slowness of taking tickets to hold back the rush.
In short, you have the perfect dates for your trip. Lighter crowds, and shorter hours that allow you to take maximum advantage of all of them.
--------------------------------------Double post added here.
Wait, I forgot early entry days... I have AP, not hoppers, so dont' know how the early entry works... Anyone, anyone. Is Thursday an early entry day?