The RV compressors are relatively unique in that they have an oil sump and a combination of pressure and splash lubrication much like an engine. There is a small rotor type oil pump driven by the crankshaft at the rear of the compressor. I don't think with the correct oil fill, the seal is actually under the sump oil level. Yes, there is oil flying around in there but, I don't think the seal sees all that much of it. the seal does depend on oil on it to keep it sealing properly which is why Chrysler wants you to run the A/C periodically in the winter.
The oil flying around I was referring to is oil being slung around the engine compartment once it gets past the seal and onto the clutch pulley. A little bit can make a big mess.
I guess we may learn what happened if the OP posts back after a new seal is installed.