Best food truck
Unless you have a food truck fetish, I'd say you're better going to some of the great restaurants in the area. There are some good food trucks (my favorite is the Lobsta Truck, but you're from Boston so you won't be impressed), but they're not better that the restaurants you can visit on the westside.
What kind of food are you looking for?
We definitely won't limit ourselves to just food trucks! I was asking because I will be working however my fiancé will be driving around exploring the city as he has never been to California. He is very much a foodie and thought it would be nice to give him a few suggestions of the food trucks around our hotel that he could easily get to.
I also concur with the advice to put the food trucks on the back burner.
Have your fiancee drive to Santa Monica to Bay Cities Deli and have the godmother sandwich. Or drive down Westwood Blvd. to Atari Sandwich Shop for some tasty Armenian/Iranian sandwiches (I recommend the Koo-Koo sandwich if you're adventurous). After Atari, stroll across the street and have some rose water and/or saffron ice cream.
If you want to experience food truck central, head east on Wilshire Blvd just east of Fairfax in front of the museum where you'll find a ton of food trucks parked. My recommendation would be to keep driving past the food trucks to Alvarado, make a right and then a left on 7th and head to Langer's for the #19 sandwich.
Lots of good eats in LA... enjoy your visit!!
FYI to Wolfielvsfood, Tacos Leo Truck is located nights at Venice Blvd and La Brea Blvd. Tacos Leo features an al pastor roasting spit on Fridays and Saturdays.
I am also a fan of El Chato, another old school taco truck located nights at Olympic Blvd and La Brea Blvd
re: Norm Man
my problem with El Chato is how they approach al pastor.
Al pastor @ El Chato is on a spit, but they carve off of it constantly into plastic holding bins that are kept somewhere. So when you get al pastor tacos @ El Chato, they don't come off the spit, but from a holding bin.
@ Tacos Leo, it was right off the spit to the tortilla. Seeing the guy work the knife was great, like a free 15 second show.
....at least this was my experience when I did a taco crawl ~2 years ago.
I would also like to say...IMHO the taco truck scene is distinctly Los Angeles whereas the FancyTruck scene is EVERYWHERE.
My favorite food trucks all serve sandwiches...
1. South Philly Experience
2. Lobsta Truck
3. Nom Nom
But for a truly LA food truck experience go to a taco truck one evening. I like the one on the corner of La Brea and Olympic and the one on Fair Oaks, north of Colorado in Pasadena.
Lots of food trucks used to congregate during the week at the UCLA campus, which is in Westwood, but a quick Google leads me to believe that they are no longer there. In that case, I do think the next closest spot would be at LACMA. I would highly recommend LACMA to out of town visitors, but I think I would rather go to Ray's (the restaurant there) than eat at the trucks.
If you want a truly Unique Food Truck Experience on a Saturday or Sunday until 1 pm in DTLA go to Handsome Coffee roasters and there will be a truck called Egg Slut that serves the most perfectly soft poached egg I have ever had in several different dishes. The menu changes frequently but it all has been good so far and Handsome Coffee Roasters has Excellent coffee.
Handsome Coffee Roasters
582 Mateo Street
Los Angeles, CA 90013
Not a truck but a street vendor is Ricky's Fish Tacos He mainly works on weekends near the corner of Sunset and Hollywood Blvds Best Ensenada style Fried Fish Taco in LA.
1400 N Virgil Ave
Los Angeles, CA 90027
Something else you might not find in Boston is Banh Mi the Vietnamese sandwich. While the trucks in LA which have them are not the absolute best they are decent versions and are likely to be found closer to where you will be staying.
And last but not least you should at least try Kogi, since they started this craze. They have 4 trucks which roam around and they are easy to find and the food there can be described as Flavor Bombs.
That should tie you over for your trip because you really should try the Central, and South American plus Asian restaurants which can be found in abundance here. Now if I can only convince the former owners of Buzzy Roast Beef which was over by Mass General to come to LA and start a food truck. I'd be all set.