If you are interested, my husband was able to interview one of the elders of one of the three churches this weekend. He is adamantly against any kind of synergism, and professes to be a 5 point Calvinist, holds to double predestination, and the singular will of God.
While he is pre-millennial in beliefs, he is not dispensationalist and does not necessarily believe in a pre-tribulational rapture. So it sounds like maybe there are some people more in line with the "old school" pre-millennialism after all. This guy claims that his beliefs are pretty much in line with what is taught at the Master's Seminary.
We are probably going to look more into fellowshipping with these people. The gospel is taught and we haven't found any other red flags. I'm tired of "Reformed" churches, so at least it is different.