Is there any water under there? Adult mozzies like shady, humid places. But they love pools of water to lay their eggs in. If you have pools of water you can either empty out the water, or spray oil on it. The thin film of oil on the water suffocates the wrigglers, which are air breathers. They have a snorkel in their tail which they use to breathe.
Another possible mozzie killer (I haven't tested this, but the theory is right) is to add a couple of drops of detergent to the water. This breaks the surface tension and should also stop the wrigglers from successfully using the surface tension to hold their snorkel in place.
Choose whichever will be safest to whatever needs that water.
The dog's water bowl shouldn't be a problem, if the water gets changed daily.
Outside, mozzies tend to bite more at dusk and sunrise. So strong suggestion - wear a good repellent and/or cover your limbs.
Indoors, screens on windows and doors are a good investment. Most Sydney houses have them almost as standard.
If your bedroom does not have screened windows, then maybe you will have to shut your window at bedtime. Before you go to bed - every night go carefully around the room with the spray, and spray every mozzie you see aiming for a direct hit with a short, sharp burst of spray. Look on the ceiling and the walls. And if you hear a mozzie in the night tat you missed - get up and do it again, or you will get bitten in your sleep. Again.
Mozzie zappers are not foolproof but are maybe better than nothing. There are chemical patches you can get which fit into plugs that you can plug in and switch on. Also there are mosquito coils which you can light and leave burning, they smell like burning hair. Or you can wear mozzie repellent to bed.
I've also heard of a gadget which emits a high-pitched whine which sounds exactly like a male mosquito. Apparently female mozzies avoid the males until it's mating time.
Spraying in the general area, outdoors, every few days, will not do a darn thing against mozzies. You might get one or two but more can fly in a few minutes later after the spray has dissipated.
We have a lot of mozzies where we live. Further into the town there aren't many at all. We think a lot of ours come from a brackish lagoon on the headland, and we're the nearest human habitation to the lagoon. Just about everyone in our street has a big mozzie problem.
Do you have a fishpond? Does it have fish in it? If not, get some. Your fishpond could be the mozzie breeding ground. Stocking it with fish should solve the mozzie problem. Just make sure any fish have safe shelter, from anything that could hunt them. We've got a number of water plants in our pond, plus we have frogs which are eating the wrigglers.
Good luck. I hate mozzies.
Marg