If you use the official UO site for packages, it comes out pretty good. That will give you a few hotels to try, and then I'd go on the individual hotel website and price it out that way.
We've stayed at Sleep Inn, Red Rood Inn and Hampton Inn with free bus service. Try Hotelkingdom.com for those. This summer we're at RPR at $129 per night. For the FOTL it's totally worth the extra money!!!