Hi
We still get condensation under the tank in winter, although dry in summer. We also let the pressure out of the hosereel for a while and then put a sealed Hozelok coupling on to prevent further water dripping from the hose reel's inlet. Occassional mishaps won't matter.
Always protect our vans floor with a couple of coats of ProtectaKote. It also has rubberised granules in it so does also help to prevent slippage as well.
Spruce