don't play to much right before and right after eating,,puppies can get worked up and vomit food, and later as they age, bloat may be a concern.
I'd see how he's doing when your home,,by 8 weeks, I'd try your schedule, potty/eat/potty maybe a short walk? crate for 4 hours, lunch / potty/ walk if you can and again 4 hours when you get home ,,at nite I'd give much more freedom as being in a crate all day can definitely wind him up so he's gonna be a terror
Just an FYI,,since you'll be home for two weeks, work on leaving him alone in his crate for a bit a few times a day,,you don't want him to have a hissy fit when you go back to work because he hasn't had "alone" time in his crate..
I always leave a radio on, and don't be surprised if you crate him, and you just leave the room vs leave the house that he goes bonkers...they "know" when your in the house and just don't like being separated but he needs to get used to it..