Three different questions
A program listing can describe the activity without describing the total cost or logistics of reaching it. Check the event itself, the requirements for entering the park, and your route to the meeting point as separate questions. A missing event price is not evidence of a free trip.
Use a plan with a fallback
RARA’s Bryce Canyon Stargazing entry points to the National Park Service astronomy page. Return to that official page when choosing a date rather than relying on a saved description or an old search snippet. Look for the current meeting location, timing, booking instructions and any changes. For weather-dependent plans, choose an alternative evening activity before you travel so a cancellation does not leave you improvising everything at once.
What the catalog can and cannot tell you
The collection is useful for discovering a possibility, not confirming tonight’s program. An admission estimate is also not comparable with the price of a jar of spice, which is why RARA excludes admission-only estimates from a finite product budget. Save the discovery, then verify the itinerary with the park. Keep the program URL and the official planning page in your notes; a beautiful sky photograph cannot tell you whether a particular event is running.