Your dream is rich with symbolism and emotions that reflect various aspects of your life. Here's an interpretation of the key elements:

1. Cats: Cats often symbolize independence, intuition, and femininity. The fact that your cats were well-behaved suggests you may feel in control of certain aspects of your life or relationships.
2. Mount Rainier and Vacation Home: This setting could represent a place of comfort and nostalgia, possibly reflecting a desire to reconnect with family or your childhood. It may also symbolize a journey or a quest for personal growth.
3. Family and Childhood Dog: The presence of family, especially your childhood dog, suggests a longing for connection and a return to your roots. Dogs often symbolize loyalty, companionship, and protection, indicating that you may be seeking support from those close to you.
4. Llamas and Sheep: These animals could represent different aspects of community and social interactions. Llamas can symbolize adaptability and endurance, while sheep may represent conformity or following the crowd. Their interaction with your dog might indicate how your social circle influences your instincts or loyalty.
5. Leaving Glasses Behind: Glasses often symbolize clarity and perception. Forgetting them might reflect feelings of uncertainty or a lack of focus in your waking life. It suggests you may feel unprepared for a situation or that you are missing important insights.
6. Driving Without GPS: This aspect of the dream may indicate feelings of being lost or unsure of your direction in life. It could symbolize a fear of making the wrong choices or losing control.
7. The Steep Dirt Road and Car Spin-Out: The steep road represents challenges or obstacles you might be facing. Losing control of the car and spinning out before falling can symbolize feelings of anxiety or fear of failure. It might indicate that you are grappling with situations that feel overwhelming or out of your control.
8. Waking Before Impact: This could symbolize a fear of consequences or a desire to avoid a situation that feels risky. It might also suggest that you are currently in a phase of anticipation, where you are unsure of what the future holds.

Overall, your dream may reflect a combination of nostalgia, a desire for connection, and anxiety about your current path or decisions. It could be beneficial to reflect on any current challenges or transitions in your life and how you might regain a sense of control and clarity moving forward.