if you can watch her from a distance (binnoculars) that would probably solve the "oo pet me" problem.
generally she will have picked somwhere sheltered smallish and dark.
under bushes, under decks, and in sheds are usually favorites. attics and basments follow (some will dig under houses or use holes made by other animals to get under houses)
in the early weeks, mewing and smell are pretty much not happening, a good momma keeps her nest very clean and babies know instinctively that mewing will also attract predators so unless mommas very close or there realy hungry, they will usually keep quiet
you can sometimes see paths through bushes/longer grass when mommas use them frequently, sometimes it is fairly easy to follow these little worn paths to the nest, othertimes mommas are wiley and use a different route frequently to keep predators away.
if you have a dog thats often a good way to find the nest, put him (or a neighbors dog) on leash and follow his nose, most dogs, even those raised and that love cats are interested in cat nests and will frequently lead you right to them... (this is how most people find kittens, usually after the dog has already raided the nest
)
good luck finding them, the sooner you can find them and hopefully get them and momma indoors the better chance of those babies being tamed and making good family pets. i generally find kittens under 4 weeks easiest to socilize to humans and it REALY helps is momma is people friendly!
