Help With Arm and Disarm Widgets

@Darren_Underhill it looks like @kevin has you covered if you want to go the Tasker route.

As he mentioned, SharpTools also has some out of the box widgets, but they will be smaller than what you are looking for. Pairing up SharpTools + Tasker with a custom widget like KWGT will let you have a large widget that does exactly what you want.

If you are looking for some inspiration, check out the large-screen setup @73roderick just posted:
https://yyz2.discourse-cdn.com/smartthings/uploads/default/optimized/3X/b/e/beea75669b7d2a7236d928ecf02ce51bd1ff47c2_1_690x388.jpg