You have to use pins...both on the edges and through the wood...use epoxy on high stress areas..glueing spars together...gear blocks..firewalls..stabs...and pinned hinges...for everything else I use elmers white glue..
a few years back pretty well totaled an airplane...there was some wing damage but it was a trainer and I was done with it etc etc.. anyway layed the wing on the ground so the center was off the ground..had my daughter jump on and right back off of it.. now there was wood cracking but the wing went flat and popped right back up..
so don't worry about strength