The type of boat I am using has a maximum occupancy of 10 people. However, I am not intending to fill the boat to its capacity as this would involve having to convert a double bed at the front of the boat into a living space during the day time, and then converting it back into a bed at the end of the day. Also, in my experience it is far better to under crew a boat to make the journey more comfortable. There are four cabins, two with king size beds, one with two single berths and a fourth with two single berths that can be combined into a double bed. I can email a layout plan of the boat to anyone emailing me and requesting it. My wife and I will be taking up two of the eight available places on each trip, leaving six places available on each of the trips. However, if the idea proves to be hugely popular I can book another identical boat to broaden the capacity. I could even book two other very similar boats if necessary, but I do not anticipate this being the case. My wife and I will be contributing to the holiday financially just the same as any other crew members. I have simply taken the cost of the boat hire, added an estimated allowance to cover costs for provisions, and divided by eight to arrive at the cost quoted. If the boat did not have a full compliment on each trip I suppose we would subsidise the trip to make it viable, but this could not extend beyond the odd one or two missing crew members. Yes secure car parking is provided and included in the cost at the boatyard with the usual proviso that the proprietors cannot be held liable or responsible. Hope this helps.