I've done most of my sailing single handed. Launching a spinnaker is nuts... kudos to anyone who can do that... I'll stick with drifters. Consider getting a backup auto-pilot... one that has auto-tack is always nice. Radar allows you to setup alarm circles which are a life saver, an alarm goes off when something crosses an imaginary line. It allows you to get some sleep. Jack lines shouldn't be considered optional. I agree with others, coming and going are the toughest part because of traffic, once you're a day out things are easier.
Just keep in mind... I think it's 10 minutes from horizon to impact (something like that) for ships at sea and I've heard, off shore, these guys don't even have people on watch most of the time. Given 2-3 days you might be in too close for radar alarms to work - which means you're really just counting on luck when you're asleep.