Frankly I prefer to treat seasonal team members the same way I would as a regular one. Even if they're only there for a short time, I'd like to help them develop habits and a mindset that would be beneficial to them and those they come into contact with beyond Spot.
Not only do I like to teach them any and every area that I know from the bare bones, but even the little niches and tricks of that area. You never know if they'll be in a situation where they're going to somehow be on their own without help, may as well arm them with as much knowledge as they can contain so they can be a more valuable asset to the team and perhaps a better version of themselves in the long run.
Don't be a bitter and jaded prick, lighten up, and be a good example. That's my philosophy. /rant