The best experience was to rent a scooter and drive arount the island. Not so much traffic and roads good or not so bad.
Listen to the locals. They always know what's best. They are probably the nicest people I've met since I started travelling.
Renting a motorbike was very easy from Siquijor harbor.But check the motorbike before you leave, some of them are quite bad.
We were told that min. charge is 2 days. We payed 300 pesos/motorbike/day. Also we found a little surprise when we asked boats/ferries going back to Dumaguete. Companies change schedules so that you can´t know times beforehand. I.e. that day we came back there was not late boats at all.
A good place for relaxing and staying 3 days. Good diving of coral garden, macro life and hundreds of fish in Paliton beach.
Overall, place is unexploited but the Government should make a move to promote the tourism in this place.