Just to clarify, I'm dreading glassing my own boat, I'm not dreading you glassing your's!
The plans recomend a layer of glass on the bottom of the boat, there's no need to glass the joints inside, just run a fillet with your glue of choice around the gussets.
There is an option of using the "stitch and glue" method for building these boats, where the wooden gussets are replaced with large glue fillets, and perhaps some fibreglass tape as well. These joints used instead of (not as well as) the wooden gussets. Ed Jones built his pocket cruiser this way and seems to have been very succesful. There was also a weekender builder who did this as well. I believe its more costly in glue this way, and also perhaps a bit harder to get the shape of everything just right, but perfectly valid if that's you cup of tea.
As for your dad, can't you convert him to the Church of the Holy Wooden Boat? Or would the Weekender be counted as a "graven idol."