These are what my LBS recommended to securely lock the bike. http://www.peterwhitecycles.com/pitlock.asp
While it is true you need a special tool to take the couplers apart, its a tool that any bike thief can easily order online. I may be more sensitive to this after having my bike friday stolen. Now I only leave a bike parked with a NYC kryptonite lock, cuz I realize how easy it is to cut a cable lock. I haven't left Feronia locked anywhere yet, but the LBS guys said if I am going to do it, to purchase the front wheel skewer lock from peter, and then lock the front wheel plus down tube with one NYC long to an immobile object, and the rear wheel plus seat tube with another NYC lock to an immobile object. BUT that means you have to carry 10 lb of locks with you! I will just try to not have to lock my bike, eat in outdoor restaurants, or use a light lock by sit where I can see it, or leave it in a hotel room. I don't camp by bike, but you mentioned camping. If you are going to camp, maybe you do want a full blown loaded touring bike! I am sooo curious to see how your bike turns out. I like your builders attitutude towards women, just recognizing that you need a shallow STA, 650c wheels and a short top tube says a lot. While I think the bikes I have are it for me, I've learned to never say never. Stuff happens, bikes get crashed, bikes get stolen. So, if I do ever do this again I would go custom if I could find the right builder.