It`s bloody rare the weather is warm enough for that here Rob! I`d say you want to be damn sure you know what you`re doing if you ever put them down too, damn sure. Can I just observe here that you`re talking about daily handling sessions... If you`re handling every single day that`s a bit much for them really, there`s such a thing as too much handling believe it or not...
Here`s an idea, if it`s ever warm enough that is, here`s a link to a guy I follow on YouTube, his names Zack and he has some beautiful snakes. In this clip he`s made a wee structure out of pvc piping which I thought was quite inspiring. You could make a similar wee contraption for your Corns which you could place them on for photographs. That might be a little more controlled than putting them on the floor
YouTube - Lemondrop Exploring the Wilderness