No negociation required. I simply asked "I'm traveling by myself, is there a single's version of the package"? Or, "what can you do for a single"?
What I do first though, I add up the ala cart cost (for 2) of all the items in the "package" just to see how much "saving" the "package" really offer. (use that formula, you'll immediately notice the Loveland "package" isn't much of a "deal" to bother duplicating) I then divide the "saving" by two and that produces the theorecticall saving PER PERSON.
Now, if I substract that "saving per person" to the sum total of all the items FOR ONE (do keep in mind you're paying for the whole room, not half of a room). Ideally that should be my price FOR ONE! I would ask them if they can "do that". To be honest, I don't always get that price. But often enough, I got offers that are pretty close to that. And sometimes, I even got offers that beats that (like, they gave me the WHOLE saving, not just half of it)!
Mind you, it's still more expensive than having someone to share with since I'm having the whole motel room all to myself after all!