USB hotspot from USB adapter

Hi all. In the summers, I stay at a remote location that requires me to have a 25' usb antenna with an external internet adapter to receive a signal (from across a lake) to my laptop. What I was wondering is if I can plug in a second USB antenna which would hopefully generate a wifi hotspot (from the same laptop) for my 11 year old to use her Ipad or even a second laptop that doesn't have the fancy antenna. I've played with the adhoc network ability in W7 but all info I can find assumes that the primary connection is from a wired source. I'm no pro at these things, but I'm persistent so any advice would be really appreciated...if it's even possible.

-Travis

Beautiful! Thanks.
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Works great. I didn't even have to get into the network manager and muck around. My family and I thank you.

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