Would like to take the 1 hr lighthouse and shipyard cruise. My wife can walk with assistance for short distances but also has a light weight wheelchair that folds. Can she manage to get on and off ship?

I think yes! We just did land and sea tour and it was all wheelchair accessible!

As the boat lists side to side, she may roll to and fro.

Yes. But like someone already said probably only accessible to main deck

We just took that cruise last weekend, there is a ladder to climb to get on the top deck. There is a ramp to get on the boat to the lower level seating...you may want to ask about that as well.

Hey John, it might be best to call them directly. They are usually great with special accomdations, and they will have specific dimensions to know if the wheelchair will work. :) Enjoy your trip!