First off, the cue cards will be approximately 4" wide, and be printed on the front and back of card stock paper. They will be given to riders in a ziploc baggie, but it is still recommended that they get transferred to a cue card holder. There are many options for map or cue card holders, so I'll let you shop for yourself.
For any gravel ride, you have to read your cards. DO NOT just follow another rider and assume they are correct. Blindly following another rider can sometimes lead to many extra miles. Use common sense. Know that many country roads are set up on a one mile grid system. It also helps if you read a cue ahead of the one you are on. Here are what different cues mean and what a cue card might look like.
R- Right turn
L- Left turn
CR- Curve Right. When there isn’t an intersection or the road doesn’t make a 90 degree turn, but still changes names.
CL- Curve Left. Refer to above.
QR- Quick Right. When there is a turn taking place less than 200 meters after the previous turn.
QL- Quick Left. Refer to above.
ST- Stay Straight. When the road may seem ambiguous, or changes names, but you need to continue going straight.
CP- Checkpoint. Make sure you check in here.
XX- Could mean Start, Finish, or Caution. Read the cue card for details.