@ altergo,
Thanks for posting the picture. I liked it though. But sorry to tell you that I have here more than 5 yrs and I dont think i should give u more explanation. I visited to texas N oklahoma also in summer brk but i spend my undergrad in NY and MA. I live 30 min drive from Niagara Falls and 10 min walk from Peace bridge. So, I know how the situation in Buffalo. If You get greyhound in Downtown buffalo, you might be the one of them for random check. I prefer to be in safe side rather than being in trouble (if in case). I should assume that you haven't read the link yet. I wrote mine and my roomate's experiences And also whats the harm of carrying your photo copied document? It doesnt hurt you neither makes u feel down. And rk attel asked for suggestions and he deserve to know what might be the possibility and it is his choice whether to carry documents or not. So, I would suggest you not to underestimate others before saying others. Should I tell you a story when a nepali guy was arrested in philadelphia coz he wasn't carrying any documents and though he had DL?

At conculsion, if you are travelling around the border, border patrol will be done randomly around 100 miles radius basis. But its up to you whether to carry documents or not. I prefer carrying it coz I always travel on amtrak and planes once I'm done with my semester. My international student advisor also requests us to carry documents though we are travelling inside coz you dont know what might happen.