This speedlite from Yongnuo can be triggered wirelessly and is 75% cheaper than Nikon’s or Canon’s equivalent. A great value for the money!
I use V-flats all the time either bouncing natural light for fill from a window or speedlite, or as negative fill to reduce light. These V-flats are super convenient to use and fold up so they fit in your car. Check ’em out at V-Flat World. com