To frost or not to

Looks like we will dodge the frost bullet for the forseeable future.  It got to about 38 this morning at 6:20 as I was harvesting lettuce for the market.  A little white frost came down on the barn roof and I could feel it starting to form on the lettuce leaves, but I don't think it hurt anything.  I dragged some reemay cloth over the zucchini plants as a precaution.  We'll see later today and tomorrow if anything was touched.   Most of the tender stuff is on the way out anyway, but it is always a bummer to see frost damage this early.  The only consolation is the galinsoga will go down also.  At this point, the only planting left to do is the garlic.  Probably the first week of October.