Running multiple camera cables from outside to indoors, do I use bushing and wall plate?
I have installed several camera setups the way you are describing for friends and my house.  I use an outdoor 90 degree outdoor junction box like these to bring the wire into the house.  I use silicone sealant in the hole in the stucco and the back of the junction box.


you insert 1 plug at a time through the hole.  I use a short 1 1/2 " pvc pipe through the wall.  The pipe in the back of the junction box can be inserted into the pipe that goes through the wall.   

On the inside, I use a plastic electrical box and drill a large hole in the back for the wires to pass through.  For the cover on the inside, I use the plate with the large hole in the middle or take a blank cover and cut the hole to the size you want.

See diagram below: