Internet and computer access is on a camp by camp basis. My camp does have computers, but some might not even have electricity.
As for your phone, you'll have to ring up your individual service provider to see if they have international roaming if you want to keep your own number. You can keep your SIM if you have international roaming authorised, and should keep it anyway so you can have your same number again when you come back. I think I should point out that there is only ONE phone company that I am aware of, t-mobile, that actually sells SIM cards up there. If you want a prepaid phone, you need to buy the phone that is locked with the SIM of the company you buy it from, kinda like how 3 does here.
Also, your phone needs to be triband, otherwise it won't work on the American frequency. Oh, and as is mentioned on another topic, you need to make sure your phone charger will work in American power outlets. Australia and most of the rest of the world runs on 240 volts, America runs on 110. So you need to check any appliances you want to bring and see what it says about the voltage. If it says 200-240, you need a power adapter as well as a plug adapter. If it says 100-240, then you're fine and only need the power adapter.
Now I've forgotten what this post was about....
If any of you want any help with phones or anything, I've looked into it a fair bit, so either PM me, or email me or something. I'm on MSN now, email@example.com