You didn't mention the fiber content of your yarn....but if it's wool, you should do felted joins. But I'm sure you know that.
Another join that I prefer sometimes is called the 'Russian Join' when felted joins won't work. The Russian Join is so easy, and can be invisible! No ends to weave at all!
Amy shows both in our bank of videos! You can also YouTube the techniques. Tons of videos pop up.