I have 2 large plastic tubs with lids for mine and my wifes dive gear. One each keeps everything neatly separated. When it's time to go diving we just throw them into the back of the truck.
At the dive site/boat ramp we use a holdall or couple of net bags to carry everything onto the boat as the tubs won't fit under the seats. When we come back, everything is rinsed briefly and then put back in the tubs in the car. No mess, no water.
Back at the house, we just carry/drag the tubs to the spare bathroom, throw things in the bathtub, wash them down with the shower head and hang up to dry on the pole over the bath.
Once it's all dry, it's sorted into the appropriate tub, any necessart maintenance/battery charging is done and then put back in the cupboard until the next trip. My save a dive kit lives in my tub, and I have a separate box for spares that lives at the back of the cupboard.
This works really well for us, means we get no water in the car or house and that we always have the gear to hand when we need it, without spending hours sorting or looking for things.
J.