By meeself... I also like to check in by cell phone with chase buddies who station themselves in different spots - one likes to work Paradise Valley and the mountains there to the north, and one goes for all points West, like Lake Pleasant or the White Tank range. It's fun to compare conditions with them by phone, and they get the Central Deserts or Eastern mountain report from me...or Tucson, wherever I might be at the time...
I chase alone mostly because during Monsoon the fur can fly in an instant and there's no time to coordinate. Distances are vast out here and by the time people got together for a chase, a lot would be missed. I have learned this from prior occasions taking media. In addition, I don't like to stay in one place...actually the opposite...(confess) maniac desert runner ("you're where?") and sometimes this goes all night long. A lot of people would lose patience for that I think, as well as my habit of moving from spot to spot. But that's what has brought me the best shots...
Road trips are a different story, as are the Plains, as sometimes I go on road trips alone or like to bring others at other times, and in the Plains chasing with a team can be really positive, but sometimes I chase alone if the coordinating thing doesn't happen or partners aren't available.
Road trip wise - I'm planning to get some chase friends together for a Painted Desert lightning shoot later this year. That's an example of when a team chase will be a really good time...woo-hoo....