In Reply to: We found Turtle Conservation posted by Tina G on Monday, 14. June 2010 at 07:36 Bali Time:
we weren't asked for a donation as entry.
A lady came out to meet us, guided us around, and it was only after i wanted to buy a t-shirt from the little gift shop that we spotted a donation box.
It's possible other visitors also won't be asked so i suggest visitors ask them. As you said, "Well worth a visit even if just helping to support their efforts."