Quote: ... do you put the fish right on the grill rack and cover it with the foil, or wrap it in the foil?
You can put it right on the grill if it's skin-side-down. But don't try to turn it over or you're right, it'll crumble and go bye-bye. One of my favorite things is to put it skin-side-down on the grill (this is assuming you have a FILET and not a steak!) and then put a LID over it. Like a roundish lid that fits on a 3-qt saucepan. Or you can just put foil over it. Or you can put the salmon (steak or filet) on foil, sprinkle it with lemon and black pepper and white wine, fold up the foil, and set that onto the grill.
P.S. I like salmon with maple (or a fruit glaze) but I'm not too wild about the soy sauce. My son-in-law does that all the time and I prefer it without, but then it depends on where you got your salmon and whether it's wild or farm-raised or several other things ....... The better quality (and fresher it is) the more I like to leave it undecorated!