Lawrence will probably be your best option for booking a hotel. We suggest booking a hotel as far in advance as possible. The wedding will be during fall semester and there's always a good amount of college events going on at that time.
The hotel that we recommend on the invite is the Hampton Inn on the north side of Lawrence. Since creating the invite, pricing has gone up. We now recommend Comfort Suites Inn listed below.
We listed some other top options, but there's a lot more hotels located in Lawrence as well.