Picture posting is enabled for all :)
I had similar set up last year but didn't need it... Woven plastic weedmulch seems to be good, I'd use the 5 litres ones for pumpkins though, those things are thirsty....chrisc
we use 2 ltr bottles for all our squash, courgettes, tomatoes, and cucumbers, we feed into them, too ;D
oh, I forgot, melons get one, too ;D