There is a way you can go by 4x4. Go north of La Ronge and keep going up past Reindeer and then Wollaston untill you get to Points North Landing. This where the adventure gets interesting, lots of sand for the next 90 kilometers but only about 45 of it is bad. There are trucks going in and out of there every day hauling ore and whatnot brought from the mines in the area. I have made this trip a couple of times pulling an 18 ft. riverboat and a friend pulling a 24 ft. pontoon boat. It is a long drive but worth it as there is good fishing along the way, Wollaston for example. A big benefit is that once you get to Lake Athabasca you can use a prop boat if you have one. Great concrete ramp at Stoney Rapids as well as fuel, groceries and other amenities. The biggest benefit is that you can fish if the wind blows up, the lake is narrow on the east side with many islands and protected areas. If you coming from the west and heading for the islands midway down the lake beware of high winds that can come up quickly. I got caught on that stretch 3 yrs. ago and was into 8 and 9 waves, that was a religous experience. On a plus note if your boat does go down you probably will not drown, hypothermia will have got you long before then.