I've done the walking CTR thing, and it's no big deal, just break it up into multiple packs. (More for comfort than security).
I haven't tried using travelers checks, but I'm not enthusiastic about them. It can be tricky to get the larger denominations, and some casinos might hassle you over a bunch TCs (almost as bad as cashier's checks). I'd clear it with your destination casino to make sure it's cool.
If you were to wire funds to a casino's cage, then I wouldn't THINK that they should give you any grief if you take the cash elsewhere. It's not a line of credit, it's YOUR money. Now, "walking a marker" with credit/check-cashing privileges would inspire more righteous indignation.
One thing that I bumped into on my last all-cash trip was when I was bumping around different shops. I'd, obviously, need to buy in at each store, then cash out when I was done. The problem is that when I incorporated the "home" casino into this loop, it led to a somewhat higher than desired level of cashier activity. I think I set off a couple of low level cashier alarms (multiple transaction register, etc). It might be worth bringing extra cash just to "park" at the home casino in the form of chips until the end of your trip, while moving cash around to other joints.