Camping represents an interesting aspect of mobile internet access. I cannot speak for the area you are going, but you just might find that your camping area has NO wireless internet access of any kind, nor any cell phone access either.
My father lives in a small town in OH about 20 miles from I75. I can tell you from experience that there is no att cell access once you get more than about 15 miles away (5 miles from my Dad) Yes, he lives in an actual town that has been there for over 100 years. There is sprint and verizon service, but not GSM. Of course I am using gsm.
More locally here in CA, the cities are well covered, but forget trying to get cell service from any provider that covers the entire state, even the well visited ski places are not covered, nor many of the regional hotels. My wife and I used to have service from two providers (verizon / att) in an attempt to have coverage at least most of the time. At one point, we seriously considered an Iridium sat phone, but there was no way for me to justify that price point.
One item that does work very well for me anywhere in the US that I have done business travel is my wireless sprint data card (sierra wireless usb plug in). It gives me good coverage, and the speed is not all that different than my home dsl plus wifi in the house. (works with mac, xp, and vista, which I needed) When my wife and daughter are home and on line, I use it exclusively, as my daughter's mac seems to somehow take priority use of the wifi router and suck it dry.
I do have a nokia internet pad (770) (uses WiFi - not phone system). If you happen to be somewhere that has a wifi connection, it is great. I can surf and run email (IMAP and POP) through it. Eventually, I miss a keyboard, so eventually, I will replace it with the newer model with a keyboard.
...
