If you are from out of town, here are a couple hotels to look into booking as soon as possible to keep the lowest price available! The sites typically have good cancellation policies if there was a need down the road to make any adjustments.
Hotel
Hampton Inn & Suites Chicago/Mt. Prospect
1 Randhurst Village Drive Mount Prospect, IL 60056 (847) 590-1860
This is a nice in-between location between the ceremony and reception.
Hotel
Baymont by Wyndham Glenview
1625 Milwaukee Avenue Glenview, IL 60025 (224) 217-5230
A more affordable option, another conveniently located hotel between the two locations!
Hotel
Crowne Plaza Chicago-Northbrook
2875 North Milwaukee Avenue Northbrook, IL 60062 (847) 298-2525
Hotel
Holiday Inn Express Rolling Mdws-Schaumburg Area
3477 West Algonquin Road Rolling Meadows, IL 60008 (847) 259-6600