Ask each venue about its own facilities
Walnut Creek's published carry-in, carry-out approach makes removal a planning task, not a reason to leave event bags beside a park receptacle. Chalco Hills, La Vista's Central Park and Bellevue's parks have different activity areas and existing facilities. Check usable restrooms, handwashing and outside-equipment consent for the specific reservation. An accessible guest route and a truck-service route should both fit the layout without being assumed to be the same path.
Distinguish household service from temporary project waste
Bellevue describes contracted collection for single-family and duplex residences within city limits. Do not infer the terms for renovation debris, commercial work or another Sarpy jurisdiction from that program. For a temporary container, ask the proposed provider to confirm eligibility for the property and material, plus the receiving arrangement. Keep municipal cleanup opportunities, private hauling and venue waste responsibilities as separate choices.