How much can a nature center raise with a silent auction?

Short answer: whether camp families were reached and whether the front desk was used as a channel.

Working it out from families who already come

The audience walks through the door every weekend, and most of it is on no list at all.

• Members, who joined so their children could come
• Camp families, who are the most engaged group and already paying
• Weekend visitors captured at the front desk — usually the largest untapped number
• The programme fee you are subsidising: a class visit, the bus, a camp place

Then check it against the school calendar. Whatever the arithmetic says, the naturalists who would deliver the auction's experience items are booked solid through the spring field trip season.

What moves it

Camp families

The most engaged group a centre has. They already pay, they come back annually, and they are the audience for camp scholarships.

The front desk

Hundreds of families a weekend, most of whom are on no list. Capturing them costs a sign-up sheet.

Naturalist time in the catalogue

The strongest non-animal category, and the ceiling is staff availability rather than demand: naturalist experiences.

Timing against the school calendar

Late summer or the winter gap. Spring is when the educators are booked solid and nobody can run a campaign.

Setting the goal

Name it in visits or camp places — "twelve class visits for schools that could not otherwise come" — publish the fee, and report in the same unit with a photograph from the trail. Small numbers work here because the unit is small and real.

Goal and budget mechanics: fundraising goals and budget.

General information, not legal advice for your centre. Permit conditions for educational wildlife, and what those animals may be used for, come from the issuing agency — ask them in writing rather than interpreting the permit yourself.