Re: Winterizing a trailered boat?
I just make sure mine is still in the backyard...
In your case, I would clean, inspect and repack wheel bearings. This would ensure that no water was in there to rust over the winter or freeze and crack a bearing or a hub...
If you have, brakes, I would inspect them and maybe put an anti-rust inhibitor on them. Grease any rollers, etc.
Not really that much to do...