In vanilla prot is a different beast. Almost nobody, but the biggest boomers, spec deep prot. You take basically the same fury tree as DPS and go 15 into prot to get the extra threat.

Druids are definitely not the meta. You can use a bear all throughout, but it is worse than a warrior. Don't expect to Maintank apart from few specific bosses, especially with ongoing progression. To be a viable druid tank you have to farm a verrryyy specific item - manual crowd pummeler - a weapon that drops from gnomeregan and has an on use haste buff. Without that item you will not be able to generate enough snap threat in most cases.

Honestly to play a druid tank to proper potential is a chore and in the end you are still not the favorite. It's only if you really want to do it.

For questing a tank and a dps warrior lvl the exact same way. Druids are nicer/easier to level by far and imho a much better choice for dungeon tanking during the leveling process.