I would walk. LAX is a tiny airport compared to most other international airports in the world. I used to park at the Park & Fly next to Terminal 1 and walk to any terminal (usually I'd walk to T-4 or T-6) in less than 10 mins, at a leisurely pace.

If you don't want to pay Park & Fly rates (iirc they're the most expensive), I think Lot C isn't a ton further. There's a free cell-phone lot there as well, so you can be dropped off or pick someone up without having to pay.