Wall Climbing Side Scroller

I am working on a 3D Side Scroller game and I want to add a wall climbing mechanic. I want it so you go up to a special wall and press space which will start the climb. Should I set the movement to flying? How would I go about doing this?

Have you tried this? https://answers.unrealengine.com/questions/15993/how-to-make-a-ladder-with-blueprint.html

I have and this does not apply to a Side Scroller