The smaller of the two West Marine portable toilets fits perfectly in place of the marine head. Ss holddown straps are available. The capacity is good for about three days. This option is a lot easier and less expensive than installing holding tanks.

Placement of holding tanks is problimatic. Too far aft and you affect the boats performance. One possibility is under one or both the maincabin bunks. Small, flexible tanks may work in these locations without cutting into the bunk.

One of our members in the Chesapeak Bay area added a holding tank some years back. Maybe he will share his experience.