The shoe shine guy who came to the office I used to work in 15+ years ago tipped me to the Mexican ones--of which there were two at the time--and gave me the info to pick the right one, but I've long since forgotten it, as I dropped out for several years and didn't go. The burritos were huge, the fillings authentic, the guac was plentiful, the price was right, and the patrons were mostly shirtless guys who didn't speak English, and a couple other suits like me. It was great.
I started going back again several years ago, hoping I would recognize the "right" truck by sight, but by then it was a sea of several trucks with Mexican flags, seemingly indistinguishable from each other. I recognized the name of a decent Mexican place on Whitney in Hamden, Ixtapa (across from the Glenwood Drive-In, worthy of mention for one of the best hot dogs in CT, among other things), and went with that. It was pretty much as I remembered the other place, and that's the one I've stuck with since. But it's been a while again; I'll try to get back there.
Tip: Eat it at one of the picnic tables there, bring it somewhere else to eat it, or eat it in your car while parked there where the food trucks are. Do not drive down to the public parking spaces at Long Wharf to look at the water while you eat, unless you are "cruising." Not that there's anything wrong with that, but I found out by accident so I might save some awkwardness if that's not on your agenda.
The exit is the Long Wharf exit.
