We are considering a cruise to Iceland and Scotland on Silverseas newest ship, the Endeavor,which uses zodiacs to take passengers to take passenger on to shore especially in a lot of the small ports we will be visiting. We are in are mid 70's and early 80's but are normally mobile and in decent shape for our ages. Will we have trouble getting in and out of the zodiacs? This is for people who have traveled on smaller expedition style ships. Thanks for help.