I'm with Tony...a good guitar and sax works nicely, and I do that kind of thing often. Also, a good percussionist (in my case, the sax/flute player doubles on percussion) works nicely. Bill hit it on the head. Bass and drums can be a nightmare with arranger function. If you use either, it's often best to turn off the arranger function and play left-hand bass (using the arranger drums is possible) or let the bass and drums cover the job.
The good news is, YOU control the job and have a lot of flexibility
, in terms of how you put the group together. If you run into trouble, send them all home, turn on the arranger and "knock em dead" (just kidding). Man, it would be good to have a little time with the other players so they can see how things will go down.
good luck!
Russ