As a side note, I never have to switch my action bars as a hunter. I just have macros that combine a lot of similar spells into one button. For example I have a macro that combines wingclip, raptor strike, and mongoose bite into one. Then I have another two macros that completely control everything on my pet including hunters mark, pet focus, attack, follow, revive, mend, and dismiss. All of that in just two macros.
That really frees up a lot of bar space for me, and I actually have lots of room left over without ever having to switch bars. Most of those can be found on the hunter forums in the stickies.
If you can't find them, I can copy + paste the hunter macros I use here.