Cascamite. sometimes difficult to buy but definitely still a high quality glue, not so good on plastic / wood joints but wood alone it is superb. Modern glues will always have a place in the tool box, (horses for courses)
Protecting your hull, wooden hulls coat inside and out with a runny resin then add glass cloth to the outer hull, I use .7oz cloth or a stocking, depends on the hull size,
Mark