@Jake ********
all you can do is be prepared with the 3 proofz
proof of onward travel in the number of days you'll get stamped in for
proof of 20K baht or the equivalent in CASH
proof of lodging
If they're gonna pull you aside and question you, those things can be the difference between getting in and getting sent back to where you just flew in from..
I'm not trying to scare monger you, just telling you, IF you've been here a lot or a while they COULD look at your with a critical eye when you stamp in