I understand what the councils were doing to help get Venturing off the ground, but I have seen too many train wrecks along the way and what it ends up with is Venturing with a bad taste left in one's mouth.
I have always advocated a Venture Patrol within the troop for the older boys, definitely a BSA protocol and policy for troops. Then work on Venturing as a stand-alone program, not an add on, add girls program auxiliary of the troop. When I wear the SM hat and the CA hat at the same time, both units are a long way apart. As a matter of fact, as it stands and as it has stood, my Troop and Crew have always been in two different DISTRICTS within the council. The distance between my current troop and the crew I am starting is 25 miles apart. I run two different programs for the units and I would find very little compatibility between the two that would necessitate the merging of the two for an activity.
I was CA for 14 years. I found out this weekend it went defunct a year after I left. The new Crew I am starting is in the town where the old Crew went defunct (I may be able to pick up the old CO in the deal). The first Crew was Civil War reenactors, the second Crew sill be all High Adventure/Outdoors. If one can't adapt, they can't survive. Being tied to a Troop would leave me with the impression adaptability would be at a premium.