wrote:
QUESTION: Could I have used SeeYou for this?

Yes. SeeYou allows you to import several files and join them. It wil
ask if you want to include ot ignore new waypoints that are near
existing ones. Down side is that if the contest provided airports
don't have useful comment info (CFAF, AWOS, etc) then you will lose
that as you want to keep the contest TPs untouched (at least the
coordinates).

Also, GNII also allows you to open several waypoint files.

For a contest, file #1 would be the one with the official turnpoints so
they will be number 1 through N per the contest DB. Then open another
file with all landpoints - preferrably edited so it doesn't contain any
airports that are also contest TPs.

Since these files are all typically just plain text with some type of
delimeter, it's fairly easy to do some merging with either a text
editor oe Excel, etc.

As for creating a marked up sectional for contests, Matt Herron
(GlidePlan) is working on an import function for waypoints. You then
will have the option to draw glide ratio or distance circles around the
waypoints as well. I'm sure if a bunch of us buy the current software,
Matt will be more inclined to add these features over the winter.

-Tom