If anyone is interested we removed our old sewage holding tank and hoses and replaced them with a composting toilet from AirHead. Everything was leaking and smelled aweful.
Pictures of the process can be found here:
https://www.flickr.com/photos/giarc_dra ... 8343118592
Here is a picture of the finished product.

No more pump outs. No more smell. Recreational usage only has to be emptied once at the beginning of the season.
