Assuming it's not Christmas week (with traffic backed up to Sand Lake Rd., aaaargh!), the stretch of I-4 you have to drive is generally not that bad traffic-wise, and is a lot faster and easier than the surface street routes mentioned. Coming back is even easier, you will be back at Cyprus Harbor within 90 seconds of leaving exit 71, just two right turns.
One tip, tho, always take the "Epcot" exit (it will be the second one), no matter where in Disney you are going. You can get to any of the theme parks this way, just follow the signs, and it is generally quicker than staying on I-4 the whole way.
Also, re: option 2, Vineland is under construction, making it even more of a mess than usual. If you do want to take I-Drive the whole way, I would go all the way down to 536.