Remember I am in zone 6b so I am about 2-3 weeks ahead of your planting time. You will get it all done when your weather turns warmer too. This week the nights are still hovering around 32° but I decided they needed to be planted. Here are two types of clips for PVC hoops on Amazon.

https://www.amazon.com/Pieces-Greenhouses-Covers-Shelters-Protection/dp/B0B97GZT5X/ref=asc_df_B0B97GZT5X/?tag=hyprod-20&linkCode=df0&hvadid=658453716690&hvpos=&hvnetw=g&hvrand=6121671380005638580&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9005653&hvtargid=pla-2061587741921&psc=1&mcid=1c02152103553b05aac61ee72064fb49

https://www.amazon.com/Greenhouse-Support-Stakes-Plastic-Sheeting/dp/B0B35W3BBL/ref=asc_df_B0B35W3BBL/?tag=hyprod-20&linkCode=df0&hvadid=647178260610&hvpos=&hvnetw=g&hvrand=6121671380005638580&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9005653&hvtargid=pla-1954574416518&mcid=f5e6a449774c3adb85aeb9111c028c7a&th=1