Considering that it seems the best lighting is one where the light source is big, about the only way is to add a diffuser of some sort, either an umbrella or softbox, correct? Otherwise either the light falloff would be too great because you had to move your light back pretty far, or you will have hotspots if you move the light too close. Even if you bounce the light off a panel, you are still going to have that panel to deal with.
There are ways to easily anchor a light stand down so that breezes don't knock down your equipment. 4 tent stakes and 2 long bungies can hold down a stand pretty well and won't take up a lot of space.
Some of these: http://www.amazon.com …ctive-Tools/dp/B00WC1OJXO
Some of these: http://www.amazon.com …=1-7&keywords=bungie+cord
4 stakes down, one bungie to each pair, but wrapped once around the light stand on one of the extension clamps. Just a thought? I haven't tried this yet myself, but it is my plan. Thoughts? I know it goes against your wanting to move around alot, so this won't work in that situation. 
I just bought a streaklight monolight, and am thinking about adding this accessory. I could put this light about anywhere, a tree, a light stand, have it held, etc, and it should make for a very portable system.
http://www.adorama.com/fpbd11sl.html