Have you considered asking your clients about it? 

Some of my clients are better than I am at scanning and emailing documents.  Others don't own a computer but trust the Post Office.  Then there are those who drop stuff off.  We have an office with a front desk usually staffed, but many times the slot in the door is used when we are closed.  There are many preparers working from home who have posted descriptions of drop-off methods that keep clients out of the house.  

Try to find some balance. How much are you asking clients to work for you, and how much are you willing to work for clients?