Hope you can make a trip over. If I were you I'd skip the Helena-area idea and hit up the Flathead or Lincoln county. It's 2-3 hours closer to you, one way, so you can get more ice time up in the NW part of the state. More specifically, the chain of lakes west of Marion would give you a good trip. You can fish pike, perch, trout, salmon in most of the lakes up there. Search Marion, MT in Google Earth, then scroll along Highway 2 to the west and you will find a dozen lakes that are fun. McGregor is the exception, not fishable.