I took friends and family here for the first time last year and everyone had a blast. I would advise not to arrive too late because parking is a mess, and the crowds are even worse.
I'm interested to hear if people discovered any really good stands last year. I went early specifically for the kaffir lime trees because people warned they get sold out quickly. However, I think they are well stocked now. The lime trees were there well after opening last year although the smaller trees run out quicker. There's also _the_ mango sticky rice lady who opens a little later than the other stands. Last year she ran out of the durian dessert as soon as I got to ger in line (literally the person in front of me, argh!) She was right near the entrance, in the first corner, on the side closest to the street. We tried at least 3 other mango sticky rices (I am married to a mango sticky rice fanatic) before hers and hers was superior. The rice was fresher, the rice wasn't overly sweet or "over-marinated" in coconut milk, and the mangos were sweeter. Just a perfect balance.
Anyone remember other standouts?