How much are they? - seems the wireless ones are pretty spendy...
A 'wired' one could work from the deck railing if it had even a medium ability to zoom. A wide shot of the scene without looking like a bunch of ants.
The "wired" ones usually only have about a ten ft cable or so, from what I've seen. I'm thinkin' that a wireless one down on the boathouse would be able to talk to the server without trouble. I will find out.