You don't need to remember passwords and private keys to configure the connection to the VPN Server. Save the configuration file in the VPN Server Configurator, send it by e-mail, open it in the VPN Configurator Client, click the button "Create VPN" and your Mac is ready to connect to the VPN Server. VPN Server configuration file is encrypted using the AES256 used on the Mac OS, so you can not worry about the security of information transmitted by e-mail.
