Well, I just did a little research on stainless steel post anchor units. Yikes! For 6 x 6 adjustable "galvanized", the Home Depot carries 'em for about $30 per unit. Since their vendor is Simpson, I went to the Simpson Strong-tie website and found that they manufacture the same unit in a stainless steel. Home Depot can special order them at a paltry $289 per unit. I'm leaning toward some "government work" on this part of the project.
12/1 update....
and, I found the stainless steel anchor bolts. A bit more reasonable; search for anchor bolts:
McMaster Carr
