Some weird forest plants like these my give Endor a more fantastic feel.
http://www.youtube.com/watch?v=JUdpFN4O4B0&feature=related
Further to my comments about Jabba's Palace, I'm not sure if it sits well with the idea of the Hutts being gangster's if he literally has a palace in a Royal sense.
It turns Jabba into a government within a government (Tatooine may not have been part of the Republic but by ANH it's clearly part of the Empire).
What if it's his lair and general residence but slightly undercover as a legitimate business, more like Caesar's Palace in Vegas than Caesar's Palace in ancient Rome.
It could have casinos, brothels, and bars.
The Rancor and Sarlacc pits could be entertainments and more vehicles (small like swoop bikes and medium sized schooners could afford his guests a better view) when they take their trip out to the Dune Sea.
It would tie into a culture that has pod racing too.
It could open up the Jabba scenes more and bring Tatooine back to the sort of world we saw in ANH.
Luke, Owen and Biggs were more concerned with the Empire than any ruling Hutt clans so it makes more sense if the Hutts are reduced to operating on the fringes of Tatooine society.