answer to your first question is yes,, suckers are the key.
the answer to your second question is ,, do not use a stringer , take the sides of off the fish a.s.a.p. and wrap the fillets in a wet towel,, and cook a.s.a.p.
dragging the fish around in warmer water above the thermocline releases enzymes and effects the quality of your meal. watch and see how the fish will loose it's colours and stiffen up,, not good,, it is really a form of torture for the fish.
have your shore lunch and then try fishing barbless and practice catch and release. the algonquin trout are under a lot of year around fishing pressure. try killing a bass and saving a trout. every algonquin trout is a trophy,, i hope this helps,, cheers