I wasn't sure about the single tank set-up either.... until I tried it.

We've been using the single tank in our Liberty for both RV Resort and dry camping and it has been absolutely without a problem. I have grown to like the the single tank set-up better than the black and grey dual tank set-up.

We have also used the grey water by-pass with excellent results. Even without using it, 4 or 5 days without a sewer connection has not been a problem at all.

And ya don't even have to get out of the comfort of the bus to dump it