I just bought a Morningstar Sunsaver 10 amp solar charge controller with LVD (Low Voltage Cutoff). It's pretty cool. I'm experimenting with it at home with an Odyssey PC680 agm motorcycle battery (16 Ah) and about 5 watts worth of cheapy 12V solar panels all wired in parallel. Once I decide I like the setup, I'm going to put everything into a Pelican case to make it portable.
I plan on getting the PowerFilm 20 watt foldable solar panel. I've heard great things from this panel. A little pricey at around $300, but totally worth it according to the reviews. Plus, it's their biggest foldable panel that will fit into a Pelican 1400 case. I should be able to fit it inside the case with all the other stuff. Might be able to get 2 in there, but it might be a tight fit. Who knows.