i need help fello laser mates! (first big show)

a copy and paste from PL:
I have a 500mw projector, A 700w fogger, a notebook, ilda cable, a about 150m2 room, and about 100 people at a wedding where i will do the last 3 music songs with a laser show.
I basicly need advice to get the most out of this show, to make the most WOW! effect to the people who watch.

Facts:
First point: no way i want to do a graphics show. It will be a beamshow.
No divergence control, so i guess no direct crowdscanning.
No smoke sensors that react on my fogger.
Its in a closed large room with a dancefloor, stage, and lots of seats and a bar.
I will tell a savety story before stsrting my projector.
I cant hang my projector to the ceiling. It has to be on the ground/table/stage ect.
Already got permission and "a go" from the wedding master and from the room boss.

Ideas:
I now have a 500mw white rgb projector, although i can make it 1w if i turn up the 445nm, but this will ruinin my white balance.
My plan is to scan above the heads of the crowds, ofcource with some distance between beam and head. Although this messes up visibility i guess its the best way to go?
I want to place the projector on a table, on stage. Then scan with the upper part of the scan angle, and turn the other one down.
Its planned to be used during the time that everyone dances...but maybe i can ask to turn down or dim the lights for one song?

Any other ideas and suggestions?
I got till the 25th this month, then it takes place.

i would bring a ladder and put it behind you. that way you can then go to the back of the room and put a mark on the wall at about 7 feet high. then your show will actually point down, almost resembling a crowd scan. i have seen it in real life. looks pretty good.

michael.

I would go ahead and turn up your blue and set the balance in software, if you have analog lasers anyway. Then you have the option of being able to fire mega-bright blue beams if you want to, and you can always turn it down any time.