All good advice. I'll only add I've started to defuel my gassers so as not to take off the next time out and have a flame out because I forgot to fill the tank. It does happen.
With only the fuel in the lines and carb you won't get it started and warmed up plus make it out to the end of the runway before it runs out of fuel.
I also use viton in my tanks and it stays soft no matter, if running tygon keeping it wet with fuel will keep it soft.
With living in the north comes long term storage for small gas engines. About 7 years ago I stopped draining all my tanks ( caused issues with brittle gaskets) and instead use a fuel stabilizer and then drain the tank before use and top back up with fresh fuel. All my small gas engines have been fine since going to this storage philosophy. Seafoam works well for keeping a clean fuel system.