Hey, they all say that, but its not true. i booked accomedation at the train station about 4 nites before hand as well thinking the same, but it was expensive and very average, a long way away from haadrin ( where the action is) i ended up just picking somewhere else in town and copped paying both accomedation. i was solo too and i can tell u that u def wanna be in haadrin, as it is the off season so u may find your self in a emtpy place ( like i did) which isnt much fun for meeting others...
i stayed in a nice guesthouse, on the main street there, about a block or 2 from chickcorner. cant remember the name, but u will walk past it. theres a small bar downstairs and a sign out the front saying "fukin good buckets'
its a safe place, will cost around 1000bt a nite tho. thats a private room with 2 beds and aircon. a bloke i met rocked up 2 nites before hand and found a place easy, his was abit further out ( like 5-8min walk) without aircon for around the 400-500 bart mark.
if u still insist on booking! which i dont think u should, just make sure u are in haadrin for sure. and dont pay anymore than 500bart for nonair con.
p.s i was there in may, which should be about the same crouds as u, maybe less? so u shouldnt have a prob.