Glad to benefit from a slow forum
BadNewsRef 
Let's see, your questions:
In what context did the evaluator criticize this particular call? after the game
Did he immediately point it out when you came over? that was one of the first comments
Was it just part of his list of comments he had for you? part of a small list
Did he have any positive comments about your performance? there was mention of one good call, but use my voice better [very valid, by the way]
Did he offer up any type of constructive criticism for this play or any other play that occurred? there were some constructive comments, but the main message was that bumps caused OOBs and bumps caused travels and two players colliding was incidental contact (I recalled calling a foul on activity after that contact)... lots of stuff to say 'poor judgment'
Did he seem like one of those guys who was just there to fulfill an obligation to his supervisor? I think probably not, but definitely there to show they knew the game; I would be inclined to see being an evaluator as something of a service you provide - but that's just me.
I listened with the premise that I should take everything to heart, so I left that first game thinking I must have made some pretty ignorant calls. Given that I'm just finishing my second year, it's hard to imagine any evaluator not having something critical to say, and I went to camp because I wanted an environment where people were expected to give constructive criticism.
So long as my understanding of the rule is correct, then I'm not going to second guess my call. I am going to approach camp a bit differently next time (this was my second camp). In this case, the evaluators also were commenting on the opening tipoff and how we responded as a crew but their recollection of the events did not match with what we recalled... maybe they were watching the game with a sort of distracted focus.
I think keeping my mouth shut is good advice, as is filtering what I hear - the challenge is building enough confidence in my own abilities as an official so that I can know what should be filtered out. I definitely have my work cut out for to improve posture, but I'm happy for the challenge!!
One of the evaluators happened to be a female, so maybe that means something for all of this. She worked closely with an official who was just beginning and made it known to everyone around the area [fans, coaches, players, fellow officials] that "this was just his second game" and kept referring to him as sweety and honey. I wonder how his post-processing of camp is going!
Given the rest of the comments I received from camp, I think posture, reporting and running mechanics and use of voice would go along way towards having a better experience with these evaluators. I think maybe there was a lack of objectivity - pre-judging what I did on the court by how I looked... those are all things for me to take responsibility for! Neither of the [two] evaluators were from our area, so this was the first time I recall seeing either one - maybe you tend to give more benefit of the doubt to those you have worked with.