Do you still use Film?
Do you Develop your own?
Yes, all my B&W, some color
What are the advantages/disadvantages of Digital and Film?
For digi, seeing an immediate result is nice sometimes. Film lends itself to working more carefully, which can result in better photos.
Can you, do you use both?
yes, and yes, but 99% of my "serious" work is film.
Do you use Film then scan the negs before printing?
Yes, for color work. Occasionally with B&W.
Do you think that film offers more chance of producing art by mistake / happy accident?
Not really. A lot of people may associate film with an uncertainty with "will this come out?" questions, because they don't understand the process and there are a lot of hazards to overcome between making the exposure and ending up with a print. But those things are largely controllable. Some of the hazards, for example, over-exposed highlights are hazards for film and digital, but digital allows immediate review and perhaps correction. Those kinds of technical issues don't often result in a "happy" accident.
Happy accidents such as a person's expression, or some other dynamic occurrence in the image can happen equally with film and digital photography.