Good suggestions and thanks for all the replies. I've got luggage/soft bags, etc., for the tour pak and the tour pak rack - well after I install the rack I just bought. Jeez I do not understand why the moco puts a rack on the other touring bikes but not the Tri-Glide. Profit enhancement I guess.
But packing the trunk will definitely be different than packing the two saddlebags which is what I am used to. So I imagine I'll experiment with the suggestions posted here to find what works best for us.