In the end, at least for PPL, the generation company had no effect on me as PPL is who bills me... I recommend making sure there's no start up, monthly, or early termination fee... That way, you can call your local supplier to cancel... Just keep all the paperwork. And Mark on your calendar when your period is up so that you change soon as you have to... So that they can't up your rate before you're gone...

Good luck...