Hi Jim
The cell transmitter poles are located along Highway 60. The terrain plays a great part in whether you'll get a signal. Here's some personal experiences ...
Southmost campsite on Pinetree Lake .. "1 bar" .. up on a big rock behind the tentsite. Enough signal strength to get through and chat. Stepped off the rock and signal disappeared.
Campsite on Pen Lake at mouth of Galipo Creek .. "1 bar" .. up on top of exposed point jutting into lake. Again, OK to get through and chat. Again, a narrow "zone" of reception .. about 3 feet wide! Signal was probably bouncing off rock faces alongside south Rock Lake.
Beach in front of Canoe Lake access point office .. absolutely no signal! Big rock heights surrounding the south end of the lake were obviously blocking all signals .. and that's only a few hundred meters from the highway.
So, it can be a toss-up for sure! Being out "mid-lake" near the highway may increase your chances?
Barry Bridgeford
http://www.AlgonquinAdventures.com
http://www.ABRweb.ca .. Algonquin Backcountry Recreationalists - Caring for Algonquin's Backcountry