http://www.flyertalk.com/forum/south...er-island.html
http://www.flyertalk.com/forum/trip-...-w-lan-aa.html
Here are a couple of old threads to get you started (more Easter Island than Santiago).
I can't help much on the logistics of getting to Chile's natural beauty, but I've long wanted to go back and check it out.
We actually went to Easter Island a second time a couple of years ago and camped. It was far better in my opinion. The camping was a fairly busy field near the coast but we never felt like it was too full.
There are a couple of snack places at Anakena that are worth checking out.