There was an article on this site a few weeks back they recomended shooting at, at least ISO 400 for interiors using a minimal flash just to bring out the high lights. A wide lense may help the interior part of the shoot but maybe you could shoot a few shots and stitch them together and then crop?
And would deffinately say bring the tripod
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You cant fool all of the people all of the time, some of the time all of the people will some of time but not all of the time as some of the time all of the people will some of the time but all of the people will not all of the time
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