We love all of our local wildlife and creatures that live around the cottage, please don't be alarmed if you see any of them, they have coexisted here for a long time.
As much as we love them, we would prefer it if they stayed outside.  Please be careful to not leave out any food for a long period of time.  The ants (and mice) will indeed be "marching" in if they know there is something there for them to eat.  There are plastic containers in the kitchen cabinet if you would like to use them for food storage.   
If you don't like spiders,  this may not be the place for you!  We have plenty of them inside and out.