July 20th - 22nd (26th)

Indexed by combo @ closest theater by distance first:
Updated 07/18/2012
(DP) - Digital Presentation.

Cascade Drive In, W. Chicago, IL (34.2 miles) $9.00
Keno Drive In, Pleasant Prairie, WI (58.2 miles ) $8.00 
Dark Knight Rises / Ted

McHenry Outdoor Theater, McHenry, IL (57.5 miles) $8.00
Melody Drive In, Knox, IN (95.9 miles ) $7.00 Screen 1
Tri-way Drive In, Plymouth, IN (98.7 miles) $8.00 Screen 1
Midway Drive In, Dixon, IL (120 miles) $8.00
Highway 18, Jefferson, WI (126 miles) $8.00 (DP) 
Dark Knight Rises / Dark Shadows

49er Drive In, Valparaiso, IN (54.1 Miles) $8.00
Lakeshore Drive In, Monticello, IN (117.0 miles) $9.00 (DP)
Dark Knight Rises / Rock of Ages

RT34 Drive In, Earlville, IL (75.7 miles) $8.00
Dark Knight Rises /Journey 2 (Mysterious Island)

Melody Drive In, Knox, IN (95.9 miles ) $7.00 Screen 2
Lakeshore Drive In, Monticello, IN (117.0 miles) $9.00 (DP) Screen 2
Ice Age 4 /The Amazing Spiderman

Tri-way Drive In, Plymouth, IN (98.7 miles) $8.00
Screen 2 Ted / Magic Mike
Screen 3 Ice Age 4 / Brave
Screen 4 The Amazing Spiderman / Men in Black III

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Indexed by movie title (distance): 

The Amazing Spiderman - Melody / Tri-way / Lakeshore (DP)
Brave - Tri-Way
(Batman) The Dark Knight Rises Cascade / 49er / McHenry / Keno / RT34 / Melody / Tri-way /  Lakeshore (DP) / Midway / Highway 18
The Dark Knight Rises is playing at all 10 drive-in theaters listed on this page !
Dark Shadows - McHenry / Melody / Tri-way / Midway / Highway 18 (DP)
Ice Age 4 - Melody / Tri-way / Lakeshore (DP)
Journey 2: Mysterious Island - RT34
Magic Mike - Tri-way
Men in Black III - Tri-way
Rock of Ages - 49er / Lakeshore
Ted - Cascade / Keno / Tri-way

Stats (Pending)
10 theaters, 15 screens,  10 Movies, 8 Unique combinations.

The highest (but unlikely) unique double feature combinations is 15.
The lowest is 4.

Additional Notes:
Cascade offers $14 carload admissions by request on Tuesdays.
Keno offers $12 carload admissions by request on Sundays.
Lakeshore Drive In  and Highway 18 have digital projection.