One thing has been puzzling me greatly, and it's not explained in the notes on the future. When do you use the present with future reference, and when vil or skal? However, RyagonIV's comment below may help. In the current sentence there is a specific future time reference 'hele dagen i morgen'. As they say, if you add 'vil' it would be as if you want to do it. And, though he doesn't mention this, if you added 'skal', presumably that would be you ought to do it.