No one has asked how much free time they actually have...friends of mine who have gone on this sort of trip tend to work 12-14 hr days on site and not have too much time to 'explore' or do other personal business while on the trip. In that case, there seems to be no reason for more than 1 or 2 cars (depending if they work in shifts or all simultaneously).
this is generally the schedule, it's busy 12-14hr days.
It just boggles my mind when (such as next Monday) 4 people who work for the same company are all going to get on the same plane in NY,
fly to TX,
get off the plane,
all go to the same Avis desk and each get a separate car,
follow each other to the same hotel 30 miles away (which provides free shuttle),
get up in the Am and take separate cars 4 miles to my facility (from a hotel with free shuttle service),
stay 12hrs,
all drive separately back to the hotel,
eat across the street at Carinos (ok I'm guessing here, maybe they'll split up and do something crazy like try Red Lobster),
Get up in Tuesday AM,
drive their separate cars back to the airport,
get on the same plane back to NY.
It's their company's money, but egads the waste!
When I travel for the Company I generally try to make a power-trip of it, share the car, work hard, get'r done, get back on the plane and HOME. Every now and then I'll combine a trip with a personal weekend of sightseeing in the destination city - that's cool. I've gotten to see a few cool cities that way.