We were on Expedition in Nov 07 with mostly older travellers. Several had knee/hip conditions and we all used the zodiacs....if help was needed our staff helped steady us or give extra lifts....mostly you sit on the side of the zodiac and swing around....when moving from zodiac to ship and back, you have 2 people there to assist you very carefully....I had very little problem getting around & was thrilled with the trip....DH and I both agree it was the ABSOLUTE BEST CRUISE EVER....do it & you won't be disappointed!!!