States that had free COE:
AL, AR, CA, FL, GA, IA, ID, IL, KS, KY, LA, MO, MS, MT, ND, OK, OR, PA, SD, TN, TX, VA, WA
Free for day use or camping? I've checked many of their campsites in Illinois and none are free. Here is one of their brochures:
https://www.mvr.usace.army.mil/Portals/48/docs/Recreation/ODM/ATR2022.pdf
From the brochure:
2022 Class A Campground Fees
Overnight camping fees for Class A
campgrounds are $14 for non-electric and
$20 for electric sites. All Class A
campgrounds are reservable. Discount
passes, such as the America the Beautiful
Interagency passes, will continue to be
accepted.
2022 Class B Campground Fees
Most Class B campgrounds are $12 per
night per site, except for Blanding
Landing. Blanding Landing offers electric
sites for $20 and non-electric sites for
$14 per night.
All Class B campgrounds are first
come, first served. All will now require a
credit/debit card. Discount passes, such
as the America the Beautiful Interagency
passes, will continue to be accepted.
What do the passes cover?
These passes cover entrance, access or
standard amenity fees to more than 2,000
Federal recreation sites. Senior and
Access Passes also provide a discount on
some expanded amenity fees such as
camping and boat ramp fees.