UPDATE: IanW has a good point in the comments that flashes can go thermal on you. He is right. Pop to hard and too fast and you will overheat. “Fire a flash too frequently with this setup and you will destroy it due
to overheating, unless it’s got a thermal cutout (most don’t).“
UPDATE 2: if you’re gonna do this, make sure you’re doing this on a 6V flash, i.e. 4 AA batteries. This will fry your flash if it is a 3V flash (2 AAs)
We write quite a bit about portable strobes. If you’ve been around for a while you may remember an older version of those strobes. The Sunpak family. While I have not used them myself (too young, sorry), those behemoth shoot at a staggering GN of 48 (meters) and have the look and feel to support it. That makes them ideal for sun swamped on location lighting. The nice thing is that they are old enough to be bought at ridiculously low prices second hand.