Compare the constraints that can decide the choice
Two picnic sites might cost the same while only one is reachable without a car. Ask the assistant to mark travel time as estimated if it has no verified schedule. Decide whether the shorter journey matters more than the extra facilities rather than adding arbitrary scores. For two picnic sites, identify practical access, travel time, facilities and cost. Agree whether any factor rules out a site before ranking the ones that remain.
Build a claim-and-evidence comparison
For each site, record a known fact, its source and what still needs checking. An entrance address establishes where to go. It does not establish that the route is step-free. Ask the venue about the specific entrance and path the person will use. A timetable can support scheduled travel time without proving how long the trip will actually take that day. Label estimates accordingly.
Choose and record the tradeoff
A household might pick the site with fewer facilities because everyone can reach it without a car. Record that reason and one trigger for reconsidering, such as a transport disruption. If an accessibility detail is essential, confirm it directly with the venue or participant before presenting a plan as workable. If neither site has confirmed access, leave both options provisional until the people attending can verify a workable route.