Choose one anchor
A river experience, waterpark, show, or major attraction should carry the day instead of trying to coordinate five stops.
Large groups
Large groups need fewer moving parts.
The more people you have, the more expensive every transition becomes. Pick one anchor, solve food early, and avoid splitting everyone into separate mini-trips.
Solve meals early
Large groups should decide food before everyone is hungry. Rental-house delivery or preplanned group meals can beat chasing a huge table.
Limit car shuffling
Stay in one part of the Dells for a block of time and avoid repeatedly regrouping vehicles across town.