[Klug-general] Hiding Port 22 on an SSH based VPN

[Peter]

I run a small private network over the Internet using SSH based commands
on Port 22. This port is permanently open to the rest of the Internet.
Is there a simple way of hiding it except for my own computers.

I've looked at iptables and various firewall applications but they are
all so complicated for a one off job. 

Can anyone help please?

Regards, Peter.