Finding owner operators to talk to in california

Hey everyone, thanks for the help on the last few questions I had. Getting answers directly is a lot easier than I thought it would be.

If I wanted to talk to a bunch of owner operators at once down here in socal, what would be the best way to get their attention? The obvious answer seems to be gas stations, but figuring out a way to make asking them a few questions worth their time has been tricky. I'm trying to write a report on owner operator issues in Los Angeles, but I need to find a better way of asking them about what they have to deal with in the city.

If anyone has any insights, it would be much appreciated. My ideas were to offer fuel cards, water on a hot day, gift cards to some nice restaurants with truck parking. I know these are busy guys, I don't want to waste their time and I do want to provide something they can actually use and enjoy.

Thanks for the help!