I sure wish we didn't have slugs, I have snails but only in the pond and they mostly clean up dead litter. I don't much like them anyway so I throw them out when I'm in there and it looks like they die when out of the water.
Here's a pic of the slugs I have, they are flatter than the ones I knew in the north. They hide in the daytime, often burying themselves under less than an inch of soil or litter. I have a hard time seeing them, they are much the same color as everything around them at night. They are called 'babosas' in spanish, it's one of those words that sounds like what it is.
Bandicoots eh? Are they like raccoons? Luckily my dogs keep the possums out of the yard along with the raccoons and the coatimundis. They would do a lot of damage, especially in the ponds.
