I might be missing something here but turning back in the dargon tower seems a bit problematic.

The Dragon expansion just lists the normal rules for turning back: move one space per turn, ignoring contents of spaces until you reach plain of peril.

For the normal inner region and Dragon Realm this is fine, it's never more than 3 spaces to get back, but in the Dragon Tower, it could take you up to 14 turns to move all the way back!

This seems wrong.

Am I missing a rule here?

I'm thinking about using a house rule where once you turn back, you roll a d6 as normal to move.

Once I am on my way I have never thought of turning back....usually by that time I am all in; for better or worse! Lol

I believe you would turn back by moving one space per turn, yes.

Though I've never done it myself...