Photo Idea: ULF Portraits Of Mom

Thinking of doing a series of headshot portraits to document my mothers fight with her illness (dementia?). Possibly with a ULF 11x14 camera or the 16x20 Chamonix camera (first time I would be using this camera). Would try these portraits with shorter focal length lens to create some distortion along with shallower depth of fields. In studio on white background? Or under natural light? Am not sure just yet. I might be able to use the negs to do platinum prints later on, or at worst large effective silver gelatin prints.