I would not recommend any infirm or over 75 person to attempt this trip on a fast speedboat as disembarking onto the beach in Lembongan is difficult. As you leave the boat carrying hand luggage, waves can crash into you making you unsteady on your feet. One elderly gentleman, who had a walking stick, told me that no-one had warned him how difficult getting off the boat would be. I suggest wearing swim shoes when going on this trip as they can get wet and will not slip on the boat. My wife was in bare feet and had managed to board the boat in Lembongan from the beach, but slipped and fell on the wet floor of the boat, leaving her with a black & blue bruise on her small toe for her trouble. Thank heavens your large luggage is taken onboard by the boat crew and returned to you at the dock.