I must be missing something here. I thought the PleasureWay used a 3-way fridge, so when you're on the road you either run on LP (not advisable) or 12V, not 110v. My Roadtrek has a 3-way Dometic and an inverter, but when the inverter is on it doesn't power the fridge. It is only wired to supply 110v to a couple of outlets.
The inverter can provide the 110v that is used by the crock pot and the engine alternator should be able to keep up, but it may not really charge the coach batteries. (That was the case my Chinook when I tried doing basically the same thing,) As an alternative one could get a 12V crock pot from RoadPro (used by truckers) and plug into the dash. The problem here is that the dash 12V outlet probably isn't wired heavy enough to handle the load and you risk over taxing the vehicle wiring. (Lower voltage usually means higher amps to get the same power/watts.)
I did the crock pot on the road thing once and arrived with less than a full charge on my coach battery and mostly cooked supper. I tossed the crock pot out when I got home and haven't used it since in the RV.
As others have said, the efficiency of the inverter usually means you're not going to get the full wattage out that it is spec'd for. Mine is a 750w inverter and my 600w coffee pot can trip it, to say nothing of what it does to the batteries making just one pot of coffee. I now use a percolator on the stovetop and use the inverter for running my razor and the GF's blender and charge her iPhone.
