I don't think you can hide your crop from pests - most have a good sense of smell. Physical barriers are necessary if you have problems with animals such as rabbits, deer, pigeons as they do the most damage in a very short space of time.
Slugs & snails, bugs etc - depends on whether you don't mind following a chemical warfare and use slug pellets, or try alternate methods and encourage other wildlife to the plot which feed on them. However, pest numbers can get rapidly out of control before predators move in so you'll have to think of other methods such as barriers & fine netting. These are particularly useful to prevent carrot fly infestation, or cabbage white butterflies from laying eggs on leaves, don't forget collars round brassica roots to stop cabbage root flies from laying eggs. A soapy spray help keep aphid numbers down without harming beneficial insects. And beer traps can be appealling to slugs. Using pesticide approved for crops should be a last resort if all else fails, and even then, avoid flowering plants where bees may come in contact with it.
Most (all) plants seem to be at their most vulnerable at the seedling stage and become instant snail food. However, once at a later stage of growth, some plants seem less appealling & don't need quite the same level of protection. Also, when it is hot and dry, the snail population seem missing, but after the rain they are at their worst ....