https://ridgefieldfriends.org/visit-the-refuge/ If you scroll down to the section "entrance fees & passes" you can find all the necessary information for fees. You may also use an America The Beautiful national park pass.
My granddaughter and I did the walking trail and went across the bridge there was no fee for that we parked and walked
All fees apply
Have no idea. 😁 I traveled by boat and camped along the river. I would suggest going to their website to ask.
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