Photographing a Black Rhino on Monday

Will be photographing a Black Rhino at  a zoo in Gloucestershire. Apparently he is quite friendly, so will be able to get close to him. Hoping to use some lighting outside, so will be taking my Gemini flash heads and battery pack, and various softboxes. Have to play this by ear though, all depends how the keepers feel  about using flash and how the Rhino reacts. Using  some fill in flash will enable me to separate the animal from his background and help pull out detail in the close up shots. Keep you posted how it all went after Monday.