In my limited experience the answer to that question is NO
I've done four (4) fly-ins, three with one outfitter and one with another and would not hesitate to return to either. Both have provide great service with no real problems.
First thing you may want when considering an outfitter is references. Check on pricing, pay one price or are there hidden fees? One thing that some people overlook is weight restrictions, some outfitters have low weights and some have higher. Although I have not had to deal with weight restriction I hear they can be costly (trip charge plus so much a pound).
All my experiences have with outfitters has been good, if you want any further info pm me.
Just for the record the "Bad Report" wasn't a fly-in but it was a remote location via boat and portage if I understand correctly.
Good Luck
Whopper