Looking at the calendar suggests there will be 36 afternoon matches, including bank holidays, which means 10 midweek night games. I suspect Macc will be the Christmas/New Year preferred option & Wrexham the August Bank/Easter Monday preference. That suggests that the midweek games (home & away) could be something like Southport, Halifax, Alfreton, Lincoln & Telford, some of which are a considerable distance away. In addition, trips to Dover & Torquay will surely mean stopovers for the players and Eastleigh, Salisbury, Aldershot & Braintree might come into that category too. Given that, is it any surprise that players are thinking twice before committing themselves to the National division? I think I'm right in saying that Hyde lost players on promotion for this kind of reason, and Chester also lost players, though changes in training patterns were probably as much if not more of a factor there.
In the late 70s we benefitted from the fact that players were earning good money from their jobs & therefore didn't want or need to go full-time, preferring to play for the likes of Alty rather than lower division Football League clubs like County. Maybe now we are liable to find difficulty in retaining players for the reasons outlined above - and may find recruitment equally difficult. I hope I'm wrong ...