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You can certainly get artistic/cinematic with a DSLR but it somewhat complicates the shoot. If time is a factor or if you are trying to stay low profile I would opt for a standard video camera and run the audio straight to it rather than a recorder. There are some very good ones in the lower price range nowadays and the only thing you would be trading off would be depth of field but if the situation calls for simplicity it can be worth it.
How good are the others in your group at running a DSLR rig? When it comes down to it in an interview type situation you can get by with a lot of auto function if you need to utilize a less experienced operator.
I would also take two or three 5 in 1 type reflectors. One at least to bounce light on a subject and one to cut strong overhead light with the diffuse core should appropriate shade not be available.