Because you are gone a lot, I’m not sure a powered anode is a good idea. One thing I don’t see you mentioning is whether you use a salt-based water softener. The argument for a powered anode is more compelling if a softener is involved, if only because sacrificial anodes get used up more rapidly and powered ones don’t.
In that scenario, at least you get the superior rust protection and if it solves the odor problem, so much the better. We don’t know just how long a tank must sit idle before odor is an issue regardless of anode type.
One possibility is to make it easier to add peroxide. If you go to my smelly water page, there is a link to a plumbing assembly to facilitate that.