Welcome back!
I would start just like efergie said, but maybe add a small twist. Just take the plane and transmitter out , fire it up and see how long the batteries last. Then charge and discharge one cycle and see how they hold up. I have to replace my TX battery this year, toward the end of the year, I could only get 2 good flights, about 25 min, before the Tx pack was giving me the warning. $30 for a replacement pack is lots cheaper than loosing the plane. The fuel you can probably get away with if you left it sealed securely, but I would look to put some marvel oil in the motor and work it in good (hopefully you used some kind of protection on your motor over winter). If you get enough in the motor it will want to lock on you, just pull the glow plug so you don't damage anything. Go over the control sufaces, give them a solid tug to check the integrity of the hinges, the motor mount screws to the firewall and motor. Test the screws holding the landing gear on. This would be the best time to give it another cleaning, and to make sure the rubber "keepers" are on all the clevises. All in all, probably an hour and a half to two hours getting ready.