i've done mine anywhere from 5 to 8 days and all have been fine. i'd say i prefer about 6 or 7. i usually prepare mine on a friday and the following weekend i rinse, leave in the fridge overnight, then smoke the next day. so to answer your question, 7 should be enough, but you could leave it a little longer if you want.
[B][I][COLOR=black]*A Texan transplant*[/COLOR][/I][/B]
[B][SIZE=1][COLOR=black]UDS | [COLOR=blue]Blue[/COLOR] Weber Performer Platinum | Chargriller Akorn | 22.5 Weber OTG | WSJ Gold | Mini WSM | Maverick ET-73 | [COLOR=blue]Blue [/COLOR][COLOR=black]Thermapen | Maverick PT-100 |[/COLOR] Gasser(charcoal chimney starter)[/COLOR][/SIZE][/B]