You will never look back!!
We stake ours inside on each corner with a fence pin at least 30 cm into the ground and cable-tie the frame to it top and middle
The cover needs to be trenched in. Do not listen to anyone who says you can weight it with slabs etc as A) It rarely works and allows too much "play" on the cover which then wears through and tears away and B) soil is free!! Dig a trench around the outside perimeter of the frame about 20cm deep, into which the excess cover hangs, before re-filling it and treading it down firmly.
Attach the cover to the frame with its velcro straps... these are stronger than they look!
Make sure the door cannot blow open if it is a hinged one. Most of these small tunnels have a zipp door, and this is usually the first bit to "go" to check the zip is running freely: WD40 can help but keep it off the cover
Check the cover for small holes and repair even the smallest using proper repair tape applied inside and out when the material is dry
Ensure nothing is chafing against the cover either inside or out, as this will wear a hole eventually
And your tunnel then has the best chance of staying put
We had one this size for six years before the cover became too worn to be repaired, then we went for a larger model and repurposed the frame to a fruit cage, and out site has gale force winds regularly