In this General Boundary Waters / Quetico Discussion forum, in another topic titled "first time Quetico trip" the following advice is given regarding entry into Quetico:
"Paddle in from Horse on a day permit through BWCA. You can make canada (moose bay) in 5-6 hrs. RABC...lets you cross into canada without going through customs.  It is a canadian document that pre-clears you through canadian ports-of-entry"

Is this correct? Have the regulations changed?  I have always gone through the Prairie Portage ranger station.  Can I just enter Quetico whenever and wherever I want as long as I have a RABC?