A cheap fill reflector can be had with a textured foil covered automobile windscreen reflector. These are inserted against the windscreen when parking in the sun to keep the car cooler. The surface gives a nice difuse light with very soft shadows.
Or you can just tape aluminum foil, matte side out, to a section of cardboard.
To actually reduce the direct glare, cheesecloth makes a nice shade filter. A frame of plastic plumbing pipe is lightweight, strong and if strategically selected joints aren't solvent welded it can be dismantled for transport.
Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."
System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70