Bob:

Table limits will be a minimum of $15 on a Saturday night with majority BJ games $25. Craps will be $10, 3 card poker $25, Let it Ride $25. Not sure on roulette as I have never really checked it out. Both Harrah's and Empress are $5 to get in. Empress will be less crowded.
hope this helps. If your looking for a good place to eat try Al's Steak House, McBrodies Pub downtown(1 block from Harrah's) or the Keg(2 blocks from Harrah's).
Going to the races myself, should be fun!
Chuck