I don't want to rub it in (well i guess just a littlebzb wrote:And you freaks were telling me to get a minivan. Sheesh. This is what I fit into my 2001 Tahoe for the gig last weekend:
2 24" T39s
4 OT12s
1 Gator slant rack
Plastic tub with 4 uplights and stands
2 Global Truss ST90, 2 speaker stands, and 8 feet of truss
1 Colorstrip in case
1 Martin EFX600
2 Martin SCX500
1 Jack 10 in the front seat
Traktor S4 in road case
Laptop bag
Bag with all the cables
A Coke and a smile
Oh, and me driving it.
Poinf is, you should make cardboard mockups of the designs and see if you can Tetris them all in. I'm really good at Tetris. High score, what's that mean? Did I break it?

6 16" t39's
4 jack 10
2 wedge8
10 channel mixer
16 channel mixer
10channel powered mixer
16channel powered mixer
3 amps
6 rackable effects
1 4x12 guitar cab
1 88key keyboard
guitar head
2 big moving lights
2 small lights
5 mic stands
2 speaker stands
stand for the lights
portable dj table
1 jrx112
1 slapro-sized cable case
1 jack12-sized cable case
Speaker cables and extension cords (not in cases)
mics for drums and five for intrusments/vox
Laptop
AND spare tire
Phewww, almost got tired of listing everything

OH and let's not forgot my cousin who was riding shotgun.
EDIT: forgot the two guitars and bass.