We use the Verizon MIFI 2200 unit. This gives us a WIFI hotspot for up to five users. I have a 3GB dataplane for around $30 a month. I like using this method instead of tying up my cellphone.

We get excellent service just about everywhere we go here on the East side of the US.
I use the Wilson Cradle sleek as my MIFI unit docking station which gives me use of an outside antenna around my off-road popup. I get great coverage all around my camp site with my big M90 computer, wifes HP computer, and our tablets...
If I ever need to upgrade for a bigger dataplan I will most likely go with the Millenicom unit that uses the Verizon network.
Roy Ken