Speaking to te availability of range balls, as a kid in the '60's, I used to go every year to the old Insurance City Open, at Wethersfield CC in Connecticut. There was a practice range, but I clearly remember each pro had his caddy out there shagging his balls. I don't know if the balls were supplied, but probably they had to bring their own. At this time, the local public driving range had a ball collecting machine, so one could have been made available if a sponsor were putting out the balls.