[john hall]

Well JB, since we are both in NC, we have similar off-season storage conditions. I run nothing but ethanol free in everything other than passenger vehicles. I do not drain any fuel system or burn carbs dry. I do not put any additives in my fuel. I use 6-700 gallons of gas a year in non passenger vehicle equipment.

Here is a list of equipment I run on the farm, generally with no issues.
6 gas tractors
2 gas combines
2 farm trucks
6 Cub Cadets
2 ATV's
assorted power tools

Some of that equipment sits for months, untouched (one combine gets the battery pulled in August and won't get it put back until May).

I've got a Farmall M that just got fired up 2 weeks ago for the first time since late May, absolutely no issues at all.

I do try to at least once, maybe twice during the winter to crank up everything and let it run 10 minutes or so(at least the stuff that never gets used in the winter). I also try to minimize the amount of fuel in the tank when equipment is parked for the year, that way if it is a bit "stale", adding fresh gas in the spring makes rough running issues due to old gas a non-issue. Never seem to have any carb issues that are noteworthy, I did notice the carb on my F-350 could use rebuilding yesterday, but it seems like its been 15-20 years since it was touched.

Your mileage may vary, this is just what has worked for us for forever. If I just had one lawnmower to contend with, I'd probably just put additive in it and not worry about it, but in my case there are just too many fuel systems to worry about.