After receiving more feedback from my tutors about my posters ideas, and playing around for the remainder of the the day. This is what I have created!
I decided to stick with the landscape poster instead of portrait, as I feel it works out better, and it also allows me to put more information on the poster.
For my flyers I decided to do a couple of variations, allowing people the choice to pick which ones that they want. On the back of them will be the information about the festival, and the courses.