1997 Park Ave rear valve cover removal - advice needed

I'm certain I have an oil leak from the rear valve cover on my 1997 Park Ave. It looks like I may be able to get the cover off with the removal of one heater hose. Maybe I'm being over optimistic - I don't know. I have attached 4 pictures of the rear valve cover from different angles. Any comments would be appreciated.

Ok, here is what I had to do. (1) remove the bracket that is hooked on to for engine removal (2) remove the fuel injector sight shield bracket (3) loosen the small bolts that protrude through the rear alternator bracker (4) remove one of the heater hoses.