Non-reply is usually not about you. If PM's are not seen do to not checking the site...no reply, not everyone has email notifications of their PM's. If on the road...often no reply. We travel the same months you do. We have several stop each year, but missed a couple last summer before I figured out there was a problem with email on my business server. Tent space is not a guarantee. The farther out you can schedule, the more apt it is to be available. Last minute is subject to other peoples situations...may work out splendid, or you may not get a reply till you have passed their location.