Guys, it's only a fishing report. Don't shop there if you don't like how this guy does business.
As far as a hatch chart goes, I never really thought that Bennett was really a "match the hatch" stream. Most of the trout have been in the stream for about as long as you have on that day, so something small and bug-like is going to work. If your patterns not working, then move on to the next riffle or hole and try it out there.
And I don't get all of the frustration about what Bennett is. I never fished it back in its glory years, so I guess I can only speak about what it is from the last few years. It seems like Bennett is a family orientated fishing area. A place I can take my girlfriend and daughter to. It's not the Gunnison, the Firehole or Gibbon. Bennett is somewhere you can be social, take your family and grill out. If you want "hard core" fishing, then the North Fork of the White, Current, Norfork Tailwater or the White below BSD should be on your priority list. Bennett is what it is, a place that is user friendly. Having said all of that, Trout parks really aren't my thing and I only go to them 2-3 times per year,mainly C&R season or with family.