In the west make sure to spend some time in Banff and take day to drive the icefield parkway to Jasper if you have never done it. There is one long climb, but if you take your time, you should be fine. These higways are well travelled by rvers and the scenery is amazing. From Jasper you can either go back down highway 93 (icefield parkway) or head east on the yellowhead highway 16 toward Edmonton. The campground in Banff and Jasper national park do fill up on weekends, but in June you should be fine during the week.