Glider, I usually ride year round and don't have much more than a week of not riding due to having the snow melt off. Will there be any problems running a with Seafoam in the tank?
When I replaced the fuel filter I also put a new hose to the throttle body and a new quick disconnect on (I messed it up trying to get it off to change the internal hose). This was done about 5000 mile ago.
You can run the sea foam or Marvel mystery oil year round. It cleans and the MMO will give a bit of top cylinder lube too. I don't think I would mix them in any case, one or the other will work.