foul odor

This is worth reading.

What Donn0128 said. Your water heater needs a thorough flushing a couple times a season to eliminate the Sulphur smell. This is natural after it's been sitting unused.

Sanitize the water heater with bleach or hydrogen peroxide then replace the anode rod with an aluminum or aluminum/zinc alloy rod instead of manganese.

I would not remove the anode - that's not the fix. It is protecting the tank while your using it, not just between trips.
There's no down side to it.

midnightsadie wrote:
I pulled the anode rod and threw it away, I drain my water after every trip , my rv is a 2007 and never a problem.

If you have a Suburban water heater, this has to be one of the worst suggestions in an era of bad ideas!
The sacrificial anode rod is there to help prevent the stuff in water from attacking and destroying the water tank.
As for the smell?
That is likely caused by chemicals in the city water. Outside of a RO water purification system I dont know if there is a cure.
BTW if you have a Suburban water heater, turn it off, drain the tank, remove he anode, inspect and replace if necessary, thoroughly flush the tank, replace the anode, refil with water and light it off.
If this is an Atwood tank, remove the drain plug, thoroughly flush and reinstal the plug.

I pulled the anode rod and threw it away, I drain my water after every trip , my rv is a 2007 and never a problem.