I took the EET 8-hr and seismic classes too. SUUUUPER helpful, especially for someone that doesn't have a Civil background (like me). Highly recommended.
The only stuff I brought into the 8-hr exam were the EET binders, whatever manuals EET recommended (HCM [didn't use that one at all]...
I’m going to echo what has been said above. I took in-person EET Civil review classes for the 8-hr and the seismic portions of the exam, and passed - primarily thanks to them.
My background is in Chemical engr, and I only took one civil class while in undergrad so I already felt waaaaay...