Just don't land!
Kevin - Was there anything stopping you flying approaches to your garden / off airfield site ? Just don't land! I did lots and lots of confined area approches to off airfield sites. The take off & landing bit was the same as at my airfield - no real value in putting the skids down off airfield.
Helimutt - Do you really think sending solo ppl students to and from a gliding site is a safe idea ? Those things are a pain in the AR$E at the best of times.