--If you want to restrict the numbers on a particular area then try Limited entry as in hunting regulations... people who get the limited entry would be given something like a tag number that would have to be displayed... It would include dates available for fishing with the limited entry.
--But be aware that YOU may not get a limited entry to that area and it may encourage others like myself who do not fish those waters due to the crowding to also seek a limited entry pass, thus reducing your chances of fishing the area.
--I'm not against fly fishing... in fact I have been a flyfishing club member for many years... but just because you fly fish doesn't make you an honest fisher. Might even attract some of those bad bait guys who would switch to flies just to fish these restricted fly only areas... they might even add scent to the flies!
--Why not restrict the area to people who own pre 1970 red VW beetles? I'm sure they would make sure no Dodge guys fish there.
--Be careful what you ask for... restricting areas may just motivate the people you kick out to search out your favourite super secret stretch of river.
in the lower mainland i really dont think restricting the number of anglers would do much, there would have to be basiclly a permant officer there to make sure its ok. for you to fish there.
and have you fished the campbell river on van. island theres a strech on the upper section of river which is fly only and sure is nice, and the people seem to actually KNOW to watch out behind people, on the vedder or other rivers when i bring out one of my flyrods youd be amazed at the number of people who walk willynilly behind while a sharp hook is flying through the air... believe me not prety if it gets a persons face
keep in mind i also fish a pin and a baitcaster so i would be going from various sections of the river in a day, some with the gear to gurintee a fish hookup then the fly for more angling plessure and francilly i hate rerigiing with gear, fly fishings so basic and much nicer to fight a fish.