How does visas, immigration and long-stay planning change when travelling with children or luggage?

Visa and entry conditions depend on nationality and purpose and can change. Use Thai government or immigration information and avoid treating social-media advice as legal authority. Space, seat belts, walking distance, heat and transfer points become more important. A slightly more expensive direct service may be better value for a family or heavy luggage. Confirm child seats, baggage limits and the final drop-off rather than assuming they are included. Immigration note: Entry and extension rules depend on nationality and purpose and can change. Check current Thai government or immigration requirements before relying on an older answer.