Any Class C that does not have at least 1500# of payload {OCCC, CCC whatever} is the wrong coach. Assuming you will never tow anything just filling 2 of your 3 tanks will probably put you well over the GVWR.
Case in point: "I never drive with my tanks anything but empty." Oh really? So how do you flush the toilet, wash your hands or get a drink of water with an empty fresh tank? I keep a minimum of 10 gallons just for those tasks but there is another 84#.
After 3 or 4 days at a campground and your black and grey are tanks are full you go by the dumpstation and the line is and hour or more long... or the dumpstation is full, broken down or just closed. Now you get to drive home with 2 of your 3 tanks full and probably well over your GVWR. Folks, it happens.
Forget about tools, toys, firewood etc. as you willl simply not have the capacity. The larger the Class C generally the less you will have to start with. Lots of coaches brag that you can sleep 4, 6 or even more but they never address where do you put their stuff. I have seen $150,000+ 24' Class C's with less than 900# of payload, seriously. :S
Not trying to rain on the Sprinter parade here but if want to load or tow heavy get an E-450. even my E-350 has plenty of CCC compared to any Sprinter.
As always... Opinions and YMMV.
:C