I think it is actually better if you know absolutely nothing about table games. That way you will come across natural and believable when you ask the dealers questions.
I have done many casino and casino/hotel combination shops. In fact I just did one this past weekend. If this post seems long and tedious; well that just gives you an idea of how long and tedious your report is going to be. Hotel/casino shops are basically most of the mystery shops you have done all rolled into one shop with some new ones thrown in. The reports are long and often detailed, but the pay and perks are good and you often get to keep what you win.
The main thing is you have to plan ahead on "shop route" through the property. Have an idea the order you will do the interactions. Your cell phone apps are your friends. I use Simple Note Pad to make a checkoff check list before I go to the location. That way I don't miss anything.
Make notes on it in the restroom stall after each interaction if possible - name and description of employee, opening and closing statements, table or slot number, amount won/lost. You must have a lap timing device or app. Study the guidelines well and do not make a mistake on the games. It could be expensive to do one over. Know the instructions and the form well. Know the times the restaurants and bars are open. Find out early if you need reservations. If one of the restaurants closes at 9 you want to fit your schedule such. Know when the bingo sessions are. Ask when you first arrive when poker games are, then put your name on the list. Don't put your name on the poker list and then immediately do a restaurant interaction. If possible know when the shifts change. You generally must get names of all employees you interact with. You generally stay at a table game long enough to see a dealer change. This means that you will have at least 2 dealers, 1 pit boss, and one beverage server to report on for each table game interaction. If the game is craps you will probably have 4 dealers, at least 1 supervisor, and 1 server.
The casino shops I have done generally consist of
Player's Club (sometimes 1 per shift)
at least 1 restaurant per shift
2 or 3 table games, pit bosses, and beverage servers (sometimes 2 or 3 each shift)
2 or 3 slots, attendants and beverage servers (sometimes 2 or 3 each shift)
2 cage cashiers
1 or 2 bars
1 or 2 security officers
poker sometimes
bingo sometimes
2 Valet (1 in and 1 out)
general observations of cleanliness, etc.
You need to get different employees; in other words the 2 table games cannot be the same employee. Try to get slot machines in different areas so you get different servers. Servers work from bars. So if both your slot machines are near the same bar, there is a good chance you will get the same server twice.
If you are also shopping the hotel, there are all kinds of things that could be required. Do not start "moving in" as soon as you check in and enter your room. You will need to report on things in the room before you disturb them, and you likely will be asked to take photos. Your shop form will tell you which things to check in the hotel room. Other common requirements or interactions could be:
report on the common areas, such as hallways, elevators, vending/ice machine area, elevators, windows, plants, walls, floors, ceilings, etc.
1 or 2 interactions with the housekeeping
1 or 2 interactions with front desk by phone
at least 2 interactions with front desk in person (check in and check out)
2 bell desk/baggage service interactions (one in and one out)
pool bar interaction
fitness center interaction
massage interaction
gift shop
The hotel shop you have scheduled seems like a simple one to get you started and get some experience. From there, my suggestion would be to try and find a casino shift shop where you only shop 5 to 8 casino employees and spend up to 4 hours. Then try some bar shops where you have to report on bartenders and their actions. These kinds of shops will get your ready for the overnight hotel/casino shops while giving you an idea of whether you will like them.