As others stated, the anode rod is meant to deteriorate so your water heater does not. It is known as galvanic exchange. Aluminum and magnesium as those metals readily give up their ions more the metal used in your water heater.
What year is the Salem ?? I usually don't recommend changing out the anode rod every year, but if the Salem is a new camper and that is just 1 year old, then you might want to think about replacing. You might be using really hard water with a high salt content.
If your camper is a couple of years old, then it probably last another season.
This was my anode rod last fall on a 2008 camper: Forest River Forums - MtnGuy's Album: Water Heater Anode - Picture
Still plenty left after 4 years, so I don't plan on replacing until it gets down quite a bit more.
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263