The 1100 gets some undeserved bad press. Remington QC isn't what it used to be, but the design is elegant, serviceable, and inexpensive.
Dirty shells will bring one to a stop in 200 rounds though so be prepared to clean frequently. Just keeping the exterior of the magazine tube clean will keep it shooting. In fairness, I've seen a B-391 disabled by less than 25 rounds of early Estate shells so gas is dirty and the cleaner the shells the better. Load your 20 ga with 20/28 and it will survive a long day without any cleaning.
If you can't get clean shells where you will be going, don't bring a gas auto.
Bring spares, like maybe a complete bolt assembly and an extra firing pin and spring.
Best to clean before things start breaking. Field strip, blast with Rem oil, wipe clean, and start shooting again. I'd bet that an 1100 cleaned once an hour (takes five minutes) would do just fine on one of these high volume shoots.
The key is understanding your equipment and using it intelligently. Shoot to destruction and then complain is poor technique.
