Satellite Internet

Not sure what you mean when you say it can't be done, it certainly can.
There are several mobile internet via satellite solutions.
However it can't be done cheaply!  Some of the solutions cost way more than your r-pod....

On our travels I've been dismayed by how poor cellular service can be, especially in terrain blocked areas aka mountains.   I've been spoiled by near total coverage in my otherwise backwards home state of South Carolina. 
We spent a week in Colorado where we had to go 10 miles to check email, receive texts, talk etc.
Of course I also understand a cell carrier can't pop a half million dollar cellsite up to serve 3 people in a canyon.

Don't know anything about these guys but it looks to be a good source of info-
http://www.groundcontrol.com/one-touch-flyaway_001.htm

You are correct that the send + receive nature of satellite internet requires very precise dish aiming.  Where you can get away with "good enough" when just receiving, when you are sending you must hit a pinprick in the sky.  You can buy the equipment that the satellite installers use to aim the dishes so you could get it done yourself with a standard Direcway dish (instead of an expensive self-aiming dish), but it could be tedious.

Bud, Doug, Fred .. Thanks for the suggestions & references.  A good booster is probably going to be the best solution.  The rvmobileinternet link looks useful, too.