That WAS a spendy fix! I was really hoping that it was going to be a much simpler and less expensive solution (like a leak at a fitting or valve). I have been careful to thoroughly drain the water heater tank and remove the anode when the camper is prepped for storage. The anode rod still had plenty of "donor" material left on it so I didn't have to replace it when the camper came out of storage this year. I do have a "new, still in the packaging" anode rod ready to go when the current one is used up. RE: thorough draining, that includes using a wet vac to remove the water that is below the anode plug opening, sopping up the water the vac doesn't get and then leaving the tank open to air allowing the rest of the moisture to evaporate out. To my knowledge, I've not had an issue with any "critters" taking up residence in the tank but I suppose I could tape some screen over the opening.
If you're not livin' on the edge, you're takin' up too much space!
2007 Shadow Cruiser x210, 2004 RAM 2500 4x4 QuadCab SLT 5.9L CTD, Factory Tow Pkg (3.73 axle), HaulMaster WDH