One-man rigging question

I have an ASW 15 which has fork and tongue spars with two main pins.
My current assembly method is to insert both wings and then have the
helper raise the tip of one wing and slowly lower it while the other
wing tip is on a stand. I work the pins and when they are going in I
have the helper hold the wing in place. I do this for each pin. Its
easy to do and takes only a minute. This old glider goes together much
easier than many new ones I've seen BUT the holes have to lined up
exactly.

Anyway, I'd like to rigged and waiting for the tow pilot on good days
and be able to stay up so that no one is waiting for me to land so
they can help de-rig before they go home. I envision making many trips
between pins and rigging aid trying to get things just right. I also
imagiing it will be a little different each time since I rig on grass
that nobody would mistake for a fairway. What are your expeiences with
one man riggers, two pin systems and uneven ground? I'm wondering if
the hassle will outweigh the benefits. Tip and tricks welcome.
Thanks.