Interesting, it's good that you guys foot the bill, here most excavations are paid for by the tax-payers. I'd love it if we could have self-funded amateur groups here out exploring but they will arrest you for it here. Also, in the US a museum would never purchase an artifact that wasn't excavated by an academic institution. I consider myself a very well-rounded professional archaeologist, but I don't have the degree. I've read the same books, use the same methods of excavation, conservation, and research I just didn't know this was my passion when I was going through college. I've been working professionally in the marine archaeology field for over 7 years now.
Recently I found a small cluster of paleo-human artifacts while fishing, nothing incredibly special, but an almost complete bone point caught my eye right at my feet. A subsequent search of the area produced 2 pottery sherds, one with markings and what appears to be a very old human skull fragment (haven't had this verified). I went to the small local museum nearby which houses artifacts from the same site and asked what they could tell me about them, and if they would like the pieces for their collection. Seems like a good day so far, but the guy at the museum "went to get his loupe" to inspect the artifacts closer and called the law while he was in the back. They searched me, my car, my tackle boxes and informed me that I had committed a felony in the state of Florida by removing the artifacts from the water. I explained that they came from land and that I had come to the museum to donate them. The museum director was now involved and informed me that he wouldn't have my artifacts in his museum because they were not properly excavated and therefore provenance couldn't be established.
In the end I was allowed to leave and even keep my artifacts (?!) and nothing else happened. I later went to the museum with my fiancé and noted that they only had a sketch of a bone point...I had offered them an almost complete one several months earlier but it was declined because I picked it up and was not a degreed archaeologist. To me, that "academic" wasted a great opportunity to share a little more history with the public and better his museum display. Its a shame they don't teach common sense in archaeology school. I understand that looting is a huge problem world-wide, but automatically treating everyone without a degree as a looter is akin to racism, stereo-typing, profiling or whatever you want to call it. Here an archaeologist who works with a group such as yours would be stripped of his credentials and black-listed in his own profession. It is a sad truth here in the US with many archaeologists, they are taught elitist mentalities in most schools and they carry that forward, usually to the detriment of the historical record.
Such is life, my bone point and pottery is proudly displayed in my home, where we enjoy it everyday.