Hi, i'll be arriving in Seoul on 29 Aug about 9am and thinking of taking the KTX to Busan first. Do i have to book the KTX tickets in advance or can i just buy on the spot. I'm taking the KTX back to Seoul on 31 Aug. Again, shall i buy in advance or just buy on the day itself?
I'll have my luggaes with me, hence can anyone advise me on the different class of seats on the KTX? Thanks.