You can allows a few of your friends etc to view your WordPress drafts by generating a secret URL. Even the plugin also allows you to set expiration date of the your draft URL so you can easily get control over how long draft link is available.
Install and activate Share a Draft plugin. After activation you can start generating private URLs of your draft. You get control over the drafts you are sharing your have already shared by visiting your admin area Dashboard -> Posts -> Share a Draft.