seems to me that any time I try trolling with big spoons, they start twirling and twist the hell out of the line - maybe ok if going really slow - I'd try just drifting a big spoon going with the wind, just jigging a bit,  if its slow enough;  otherwise, its usually a rapala or wally diver that goes deep that works for me on lake trout

but I use big plugs too - was using an 8" silver/blue that works well on big pike (only caught one this year, if you want to humor me and say 35" is big, or at least a little big) and waleye (forget the brand - likely something I got at wal-mart or dick's) - even smaller 15" waleye were hitting on that - nice thing, its heavy and can be cast a long way

I figure most fish are going to go after what they can see, and I'd guess that a bigger lure could be seen a little bit farther ?