You can preview your Swell event site even if it isn't live as long as you are logged into your Swell dashboard. Anyone who isn't logged in will get an under construction message.
If you're trying to share the site with your board or other outside stakeholders who don't have a username and password, you'll need to make the site live (How to publicly launch your site).
Once you launch your site, you won't be able to make it publicly available yourself, but we can help! Send us an email to ask us to inactivate the site for you. The process is extremely fast and you'll be able to launch your site again when your ready.