Don't know just how far "north" you're talking about, but I've been to Waterfalls Lodge twice and both times were just remarkable. The lodging was excellent, the food was outstanding, and the fishing.....oh, the fishing! We stayed a full week both times and I'd go back again in a heartbeat. The main lake receives very little fishing pressure because there are very few homes on it's shores. There are a few other outlying lakes that they arrange ATV trips to that have trout and some monster pike. The main lake has smallmouth, pike and lakers.
http://www.waterfallslodge.com/