IIRC, the port for the EGR solenoid is the smaller one on the bottom of the throttle body. It doesn't get any vacuum at idle, only at part throttle (i.e. ported vacuum). And as I understand it, the EGR vacuum solenoid is never fully closed. So checking for vacuum leaks can be tricky.
If you're just wanting to check the hoses, then you could disconnect both ends of the hose, then cap one end and connect the other end to a vacuum source. Be careful handling those old plastic vacuum lines. They become very brittle, and can break easily.
[This message has been edited by Blacktree (edited 07-20-2014).]