All are connected by.. friend easy transport u will see their connecting all these places.
The people their at kedarnath and badrinath willl welcome u and ur family with great responsibility
Yes I travelled chardham and the journey starts from Haridwar end to Badrinath. according to Hindu mythology 1st you should visit Yamunotri then Gangotri then come to Kedarnath and ended the yatra at Badrinath. You can travel with namaste india trip (a local private company) provieds the best services including transportation, hotel booking. https://www.namasteindiatrip.com/do-dham-yatra-by-helicopter