I had an intimate wedding at the WP and we ordered invitations. We had to order 25 - but I really wanted to have them. We did send them to people who we knew weren't coming (grandparents in nursing home, best friend due to have a baby on our wedding day.) A really good friend of mine had a fairly informal intimate wedding at sunset point, and she bought some cute beachy party invitations and had the stationery store print them on their laser printer for her. You could do something like that, depending on the formality of your wedding.
We had announcements printed too...really nice ones. Those are done in addition to an invitation, not instead and are sent out right after the wedding. We sent them to all our friends and family who we would have invited if we had a large wedding.
Hope this helps.