I generally don't foil unless the bark is getting too barky. Seems to me that chuckies benefit from foiling though. Lots of folks foil at 160 (briskets and butts). Lots of folks foil their ribs. I'm a lazy sumbich so I don't. Doesn't seem to bother anyone - the non-foiling that is. The laziness is another issue altogether.
Just fark around with it and see what you like.
50" Klose BYC, 22.5 WSM, Backwoods Chubby, UDS, 26" & 22.5" Weber Kettles, Jumbo Joe, WGA, WSJ/MUDS, Jumbo Old Smokey, a piece of expanded metal I throw over the fire pit sometimes, Stealthy Black & Vol Orange
Displaced East Tennesseean
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Former outlaw MOINK baller, now IMBAS Certified, but still lookin' over my shoulder.
"Relax, it's only BBQ.
" - Bigmista, 2013
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