hmmm
i think it will be okay, just make sure the water is at a good temp, and the fishes are bagged in poly boxes with oxygen (you can buy o2 tabs)
my parents picked upa fish once and it was in a bag for 3 hours but seemed fine; but 3 hours is stupidly long so try not to make it that long.
people manage to keep it all fine in longer than 1 hour journeys!
i think to put it in the tank, i would put water in, then rock; then fishes =] (so water at the right temp and salinity)