The rule says we can bring a field guide or a three-ring binder of any size containing information in any form and from any source attached using the available rings. Does this include allowing an intact field guide to be attached inside the 3-ring?

No. At the National Tournament, students are allowed a field guide or a binder. Intact field guides may not be placed in the binder in any form or fashion. Tabbing is allowed for whichever resource the team brings.