Well I haven't stayed at either but pass the Warren Way regularly and never heard a bad report.
Fonty's I have visited a couple of times and it always looks neat and has water there )Hence the Pool in the name
)
Fonty's is a bit further out of town so should be little road noise, Warren Way is on the Highway 1.
Heartbreak trail is a few km from Pemberton on the Warren River not free but NP cheap, stayed a few times.
At the back of Big Brook Dam also near Pemberton there is another camp area by NP but never stayed there.
Coalmine Beach in Walpole is good - have stayed there three times and close to the water and lots of other sightseeing places.
Cheers Mike