Reddit mentions of Draper 15 Meter Soaker Hose

Pumpkins/Squash will totally cover all the ground, so it can be hard to get in below the foliage to water at the base.

Do you have an outdoor tap/water supply - one suggestion I'd make is to put a soaker hose in the bed now, and plant around them. This is just an example: https://www.amazon.co.uk/Draper-15-Meter-Soaker-Hose/dp/B0001KA0DG/ref=sr_1_5?keywords=soaker+hose&qid=1556535374&s=gateway&sr=8-5 The other option is to get a 2 litre soft drinks bottle, cut off the base but keep the cap on. Heat up a bit of wire and burn some holes in the side and then you bury the bottle with a little lip above the ground. Do this BEFORE you plant in your young plants, as you don't want to disturb their roots. If you can spare a bit of cheap hose, put one end into the inside of the coke bottle, and get a small cheap funnel and wiggle it in the other end (might need to duck tape it). Tie the funnel to a bamboo cane. If you're watering/giving a liquid feed from a watering can you can pour it into the funnel, and move the cane out further away if necessary.

Can I also suggest the following for further reading: http://www.bigpumpkins.com/HowTo/ especially the link about "What's in your trench" as it talks about burying the vines to encourage secondary roots.

One thing to be wary of, is self-aborted fruits. Lots of plants do this - including Apples. Sometimes a "fruit" will start to form and swell, then for whatever reason, the plant will get rid of it - not fertilised properly, stress, too many fruits. It's perfectly natural, but very disappointing to young kids and anxiety inducing to the parents when it falls off.

Good luck.