If you your Minimum betting unit is under 100 dollars, don't sweat anything. This is on the strip of course. However, the Indian casinos I have played in the Pacific NW will get pissed if you take from their bottom line. They will make roughly around 15-30k a night yet at some of the larger ones 60-100k. Dont worry quite yet about how much you buy in for. And if your getting heat, you must be making a fortune. Also, you are going to be on and off the table throughout the session. Color up and come back later..etc.etc.. If you are playing for comps, then get your buddies players card. Use his or her name, this will help in the future.
If in fact your bankroll is 200. I would suggest you go to a roulette table and put it all on 17 and Go with the Guts!!!