We've done 42 trips to WDW, stated out driving for alot, took to the flying couple of times, not to my liking, went back to driving, throw in a couple of earlier train trips plus one Auto Train trip, and the last 10 or so have all been by regular Amtrak.
Driving when we were young was the cheapest, back in the late 70's and 80's. The Auto Train station in Lorton, is a 10 hour drive for us and we found that we didn't need a car to enjoy WDW. I have flown years ago and that's out, I will not fly again so for us to get to WDW, it's Amtrak. It is a long trips for us, northeast Ohio to Kissimmee but it has been fun and is part of the adventure. We can completely relax and sit back, no stress, no traffic. It does not take from our Disney time, we're on property 9-12 nights regardless. Airline restrictions, security scanning and the whole hoopla, I can live with out and with the flight changes, searching for deals, baggage cost, I'd rather take the train. Driving and the train are about equal in money and time, alittle longer by train but we board at 3 am andarrive in Florida by 1:30 pm following day. We get to see alot of country, we're not in any big hurry, Disney is waiting on the other end and coming home, we can sit back and relax from the hustle and bustle of WDW.