> Or, you can get an acoustic coupler (what! no way!:), hello direct sells

I have used acoustic coupler... it was a real PITA! A lot of trouble to get
it to work... when it would work

also, for quick checks you can usually talk the
> camp host into allowing you to plug in to their phone and use your
> nationwide ISP local access #...(or 800 if you are in the real boonies)

There are web sites that list campgounds by area along with a list of their
amenities... including web access! Unfortunately, I would expect to find
that the sites with internet access are likely the RV camp sites.... but
maybe not always.

Bill