Looking through these wold spider pictures will give you good examples of what wolf spiders look like so you can determine if you have wolf spiders or some other type of spider.
Here's a wolf spider in his tunnel.
Here's a wolf spider from Michigan.
This is a wolf spider in Florida.
Here's an overhead view of a wolf spider.
Here's a close up of what a wolf spider's face looks like.
This is a wolf spider with an egg sac.