We will be with RCCL and in Plymouth from 8 am to 5 pm one day in April. We are experienced cruisers and have done some excursions in the past. Most of the time, we regret paying the ship to herd us around like cattle and wish we had just done our own thing. However, we also realize that it is not feasible in some locations. Any advice? You should know that my Mom can't walk very far, she has MS, and also, we will have a four year old with us. Thanks for any suggestions!