I'm going with $2500 for now carried on me. I have an envelope with 20 $100 bills still in the bank envelope (fits well in my pocket) and another $500 which I just remember is in my console in my car and I need to go get. The $500 was leftover from my last trip. Tip--playing nothing but hold em at Argosy Cinci, their weak BJ games broke a long losing streak for me.
I like the idea about grouping your buy-in amounts, say 5 X $500. I also like the idea of buying in small, increasing the odds you will have to buy in again. I may go with $300 buy-ins. Remember they always call out your buy-in amount, so $500 might get some attention. I always wear a coat with a lot of pockets or cargo pants. That way I can segregate the funds ahead of time. I don't pull anything out of my wallet. I never show all my cash.
I'm hitting Tunica this week with a goal of $1000 profit, minimum. First trip as predominantly a green chipper, should be fun. Once I move up from green chip play I will look into markers, but for now I am ok with carrying that amount of cash around. If I get robbed I will just quickly cough up my wallet with maybe a couple hundred bucks in it.
If push comes to shove, I am not going to get into a knife fight over a couple of grand, they can have it if they can take the time to find it!