I'm in a longboard club at Manly we surf just north of the volley nets and there's a shortboard club that surfs out of queenscliff and a Manly gromet club that surfs just south of the north styne surf club then there's the surf school, the board rental places, the back packers, the westies, and the rest of the locals not too mention swimmers freaking everywhere. Metro waves will always be busy, boardrider clubs or not.
I like the club because it pushes me to evolve my surfing intead of just going out and doing the status quo and evloving slowly, I've become a better surfer in the last year I've been in the club than in the 5 before.
As for locations the Manly clubs are in the same spot at the same time every month (unless it reshcedualed to the following weekend due to conditions). None of the clubs push people off the peaks. Hell I was called into a wave one day when the queensy comp was on while riding a SUP by one of the guys in a heat and it was a cracking wave.
Guys and girls in the BR clubs in Manly all seem to be nice and don't drop in on people (you loose one of your waves if you do - we have a 6 wave max count in the LB club), I think it's one of those things where if you free surf like a dick you'll surf in a comp like a dick and well you probably just have dick head tendencies.
Had a great surf this morning shared a peak with 3 others while the heathens all climbed over each other on the next peak up, I was pretty thankful lnone of them wanted to make the paddle down to us, some cracking lefts infront of the NS surfclub

As for the Artificial Reef have a read up about the one in England tear in a bag, surfers complaining about wave quality, and the council complaing about weird rips.