Holter is two lakes below Canyon Ferry (Hauser is in between). Hauser used to be a world class kokanee fishery, but it crapped out 10 - 15 years ago. FWP has tried to resurect it a couple of times, and a 7 pound state record was caught there in 2010, but I think the kokanees have run their course in Hauser. Holter has never to my knowledge been a kokanee fishery. The stocking reports show they did a stocking of kokanee in Holter in 2009, but not since, and I've never heard of any being caught out of Holter. Holter can be very good for rainbows in the 2-5 pound range and walleye and perch fishing can be pretty good. Helena Valley Regulating Reservoir is a pretty decent kokanee fishery in the Helena area. It's a small lake (about 500 acres), relatively shallow (there is some 40 - 50 foot deep water, but most of the lake is 12 - 25 feet deep. It is an electric trolling motor use only lake. I do pretty well trolling with the usual kokanee gear - dodgers and spinners, hoochies and apexes tipped with corn/gulp maggots. The fish have been running about 14 - 15 inches pretty consistently. I'd take you out while your here, but I'll be out of town for my daughter's wedding.