Re: Lube the steering
WD40 is a drying agent more than a lubricant, so while it's good for cleaning, it leaves the device, well, dry. So follow up with a lube. I like white lithium grease.
Ironically, when you have a troublesome steering rod, it's better to leave them extended, not in. For one thing they dry out. For another, when you go to break them loose with a hammer (hit against a block of wood) it's easier to hammer in than to hammer out! BTDT. But don't leave it all the way out; you want to use the play.
When busting them loose, it's OK to put a little pressure from the wheel but just a little. There's a lot of stuff up there that will just break. Be sure your helpers understand this.
I like the pin-hole idea, but I'd seal it after I used it.
I have been told that too much grease in there can cause a lock, too, and thus if you have a widget with a zerk, grease it when the rod is in, not out. But I can't swear this is legit; others know?