Paving slabs and 25l water cans are pointless. How does another 50Kg affect the ability of an aeroplane weighing perhaps 600Kg from lifting off in the wind when it regularly does so under engine at 950? Does not compute, does it?
Loops cast into the concrete apron are probably the best if you're lucky enough to have them.
On grass lorry-spring derived screw anchors are good - you'll need a bit of cutting and welding done to make them up and soft ground to instal them but they're cheap and effective.
If you've an existing concrete apron expanding bolts with a loop head are cheap and easily fitted.
If you've several aircraft to anchor get a mini digger and dig metre deep holes and bury in each an old car tyre with a tubular braided 2 ton strop looped through it to end at ground level.
Then your Halfords ratchets just hook on - brilliant cheap easy neat solution.