If you usually fish in a spot where you have good or any cell phone reception you can turn your iphone into a wifi hot spot using this app "mywi"..Basically it just uses your cell phone signal as a modem.. all wireless..I have it on my phone and it works flawlessly when I need to use my laptop with no internet connection.. its a 1 time $19.99 fee but its worth it..here is the place to download it
MyWi 5.0 - iPhone® WiFi Tethering and iPad®
MyWi 5.0 - iPhone® WiFi Tethering and iPad®