Just host the data on the darknet somewhere with hundreds of cheap VPS as internet facing fronts. Some countries still have strong protection laws for journalists (e.g. scandinavian countries, iceland) where these VPS would probably stay up for a while.
If someone controls your entrance and exit nodes they read your traffic. A substantial enough minority of network nodes have always been controlled by the government that Tor is not and has never been anything other than a massive sting operation.
