Searching ruins in Warlords I-III was always a shot in the dark. You had no clue as to what was in there until your hero blindly wandered in. And once your Hero met up with something nasty, there was no option except to fight it to the death.
It would be nice if you had a chance to run away after meeting whatever monster was guarding the ruin. When you meet a monster, you could be given the choice to fight or flee. Perhaps a hero could only choose to flee if she had more remaining movement points than the speed of the guardian creature.
If you don't like that idea, there are tons of other ways to give the player some info.... rumors in nearby cities, clues upon entering ruins, giving scouts the ability to scout a ruin....