The lodge can organise a village walk with a guide
its 200D which goes to the village and you can tip the guide
we spent 3 hours and it was the highlight of my gambia trip
no pressure to 'pay' for taking photos - the kids are so friendly, we met the village elders and everyone was so welcoming, a great experience
you do other trips to the mainland too as well as other island trips like fishing, mangrove tours..