Hi,
I can create that jquery code for you.
I can also add code to your "one_time()" function to select all child checkbox if parent is checkbox is checked.
Also, I spot an error:
Your link
[login to view URL]
redirect to
[login to view URL];-types[]=eat&date;=&date;-format=jS+F+Y&wpv_filter_submit=Wer-to?&wpv;-spend=0&wpv;-venue=0
Notice: wpv;-types[], it should be wpv-types[], without character ';'
Best regards, Goran