Gili trawangan bans all engines so it's bicycles or dokar (horse carts). From the harbor to most guesthouses costs 25k IDR now - the horses literally know every path better than any tourist with google maps.

Don't feel guilty using them, it's the main economy for local families and has been for decades. Just agree on price before loading bags. The drivers usually speak some english and know which places have the best sunset views.