Well, it looks like you've had most of your questions answered but I'll share some of my limited knowledge about internet access for those on course.
While there, I used 3 types of access. The pay machines in the GBA (Green break area), the computers in the Bistro, and fellow recruit's labtops with aircards.
The pay machines are good for a quick fix when you just need to quickly check up on some stuff and they are accessible during the week provided you can make your way to the GBA. It is 2 bucks for 10 minutes, but it's less after 10 mins and besides, how much time are you going to sit down there on the internet? You do need a credit card however as they never seemed to work by coins and a major problem for myself is that they have restricted access and I wasn't able to get on to my banking site which was one of my main reasons for wanting internet access. I know of others who were able to get on their banking sites, etc however.
In the Bistro, there is a computer room with about 8 or 9 computers. 3 or 4 of those are dedicated for online gaming only with the others for general internet use including webcams. The two biggest problems with them is that they are only accessible when the Bistro is open (only weekends if I recall correctly), and that you are limited to 20 mins of use (there is usually a big waiting line for them). The software that controls there use is also somewhat clumsy making it diffucult to have multiple windows open. And of course they are monitored for anything naughty being done on them.
Quite a few recruits during my BMQ had laptops, which they were able to access at anytime while they were upstairs in the shacks. That doesn't mean you have a lot of time during the week, but a lot of guys did so anyway. Only a few had web access and the only one I had much experience with was a buddy who hooked up through his Roger's cell phone. It was somewhat spotty and I think it cost him quite a bit. Another recruit was on some pay as you go plan with I don't know who and he was even downloading songs while at the MEGA. I heard rumours that someone had gotten onto a wifi network at the Mega but I never checked it out.
Having access to your labtop would all depend on your staff I think. Half way through our course our staff decide they didn't want people watching movies during the week on labtops and DVD players, but people still had them to play music or surf the web. We had 100% access to our civi lockup the entire time.
Just an FYI, my Telus cell phone had excellent reception at the Mega.