What is the fee

I believe $4 a car for a day pass. Federal passes accepted as well.

$4.00 per car

Donation

$4 each visit or $12 for a year

All of the fees, daily and annually are listed under "Plan you visit" on the Bombay Hook NWR website.

$4.00 per car for single visit. $12 for year car pass

You can purchase an annual pass for $12 or if the shop isn't open a daily pass can be purchased at the beginning of the loop for $4

I think it is $4 for a day pass during fee season for in state vehicles.

$4 for a car, $2 on bike or foot.

$4 per car per visit or $12 per year. Alternately you can get the $25 duck stamp from the post office which let's you visit most refuges free for a year.