Anchoring a mini polytunnel

Morning!

I may have accidentally bought a mini polytunnel for the lottie! It is the polytunnel equivalent of the blowaway so I know this is not going to last forever but wnt to make sure it lasts for as long as humaly possibl! A proper greenhouse or polytunnel is way out of my budget for now but I want a bit more space for the tomatoes, chillis etc!

I've still got to clear the ground but it is going t be on a reasonably exposed site with trees on two sides provising a little bit of shelter but not much. I want to try and make sure it oesn't end up at the other end of the lottie site if/when we get a really windy day (it has happened to a few others on the site!)! So, how to best anchor it? Bear in mind my DIY skills are patchy at best so constructing something is probably well outwith my skill set! I've purchased some wooden stakes to drive in at the corners which will attach to the frame, I understand I need to bury any excess cover in a trench but is there anything else I should do to keep it where it is? It does come with guy ropes to keep the cover anchored but I think I should probably go a bit belt and braces! I've seen some heavy duty steel pegs that go over the bits of frame that are along the ground - is it worth investing? Or perhaps going for some much heavier duty pegs for the guy ropes?

Thanks in advance!!