A flash drive would be helpful, but if you're just printing text-documents (which is going to be the case the majority of the time) it's just as well to email it to yourself. The complex labs mirror the hours of the front desks (9-5, it varies from day to day and complex to complex) while the Disney Learning Center at Vista Way is open later (can't remember how late right now).
I gave that homework estimate a good amount of padding. Some courses have heavier loads than others, but I don't personally feel it's ever more than 30mins to an hour per course. Many times I'd err more on the 30 minute estimate. As far as the classes go themselves, I enjoyed them- but depending on your previous academic history, you may or may not feel that you've covered the content already. I did feel a bit of rehash in my Communications course, but there was some theory and rhetoric that was new to me.
On PowerPoint, you can probably get away with Keynote/iWork. When I had presentations, I connected my MacBook up to the projection screen with no issues (it's a standard VGA connection) and used Keynote. All classrooms have this system, and it wasn't necessary that we actually turn in a PowerPoint file, just use a PowerPoint-style presentation as a visual aid when the assignment prescribed such.