There's a nifty trick for getting a sensible length of yarn with LT. Use two skeins! You can also use both ends of one skein so whatever works for you. This works great when you need to cast on a lot of stitches.
Here's a couple videos.
This one is just as effective, but is slightly different
I do it without a knot as one video shows, but either way works. I cut the yarn over my thumb when I'm done, but I wouldn't cut it as short as the woman in the video. I like enough to weave in.