RE: Sims 3 BG Compatible Worlds
I always use these two worlds: 1)
Hylewood by Nilxis + the matching
lighting override mod and 2)
Small Island World by Fairstead Sims.
With Hylewood, I've played in it (I have only LN and Seasons EPs) and it works fine. The watermill deco building won't be there (I think it uses Pets or another EP)...but it's not too distracting, really. It's still gorgeous and fun to explore! It has neat, little, hidden spots within the woods. :3 If you want it to look beautiful in all its Autumn splendor, definitely have at least the Seasons expansion pack. But I'm sure it'll look just as beautiful without the Autumn look (although I've never tried that yet). As for the other world, it's a beautiful, empty (no lots) island.
"Tomorrow may be hell, but today was a good writing day, and on the good writing days nothing else matters." - Neil Gaiman