Let me start off saying I am no walleye expert, but Ive caught a few and this is what worked for me. Also, I don't really know what reservoir would be closest to Missoula, Im guessing the Helena are lakes. If you really want to get one though Id spend the time and head out east, there are just more of them out there to be caught. I get them in CF fishing for perch mid-day but not regular enough to recommend, silos and confederate. Fish twilight periods or night fish, and structure is good. I usually look for large areas of deep water which comes right up to shallow flats or points, sunken islands are good as are saddles between islands or shore. Jigging worked better than the tipups set out but who really knows its all dependent on whats going on at any given time.
Best of luck and tight lines
