recommend the mavrick ET-73, 2 probes both of which you can set for alarm to go off when temp is reached, but is the only one in a reasonable price range that you can program one probe for a lo temp as well. allows you to monitor smoker box temps and alerts you when you need to ck firebox when temps get to high or when your coals loosing heat or if using gas and tank goes mt. many places to look on the net... i bought mine on ebay for 35 bux i think.http://www.cozycook.com/kitchen-185364.html
and here are others... i had a taylor which lasted many years before finally quitting, was only a single probe though... have also heard polders are good too. dont think they offer the same features as the ET-73 though.http://www.cozycook.com/cooking-1334...ter&src4=broad
if you leave the skin on, and fillet the slabs from the sides, i usually remove rib bones as well, my bro in law goes along the backbone but leaves the rib bones in, your choice. either way you will be left with the pin bones. there is an upper row identical to northern pike, they also have a lower row, bottom side of spine area running from back of ribs to the tail. they are easy to find and pull from fish when is cooked if you are feeding to a child. another option is pickling them, the bones dissolve in the brine. either way really a good fish that shouldnt be overlooked, especially for smoking. i think its worth your time to at least give them a shot.