I'll be a bit of a contrarian here.
You should pull out the seatpost and turn the bike upside down, in case there is water in the frame. Even if nothing comes out, I would leave it in a sunny area (w/out seatpost) for a couple hours to let any moisture evaporate.
You should certainly clean the chain and lube it.
If your hubs have sealed cartridge bearings, they are fine; if they are cup & cone bearings, I would probably open 'em up for a cleaning and fresh grease, but you could wait to see if they develop any roughness.
I wouldn't worry about the bottom bracket bearings - they are probably fine. If not, you'll figure it out when they show problems.