Doug, sounds like you lack experience but make up for it in enthuisasm ).
That looks like a worthwhile project. Just try to match the wood as closely as
possible & take your time. There's nothing wrong (IMO) with using superior,
currently available materials (epoxy adhesives, modern sealants etc) to make it
better than it was. One thing to check is the bottom. If it's been stored on
the trailer with uneven pressure on rollers or skids etc it can have bottom
problems (hooks or dips) that need to be adressed, early on.
Good luck & keep us posted
Greg Sefton