I enjoy the heck out of seeing people's hunting camps.
I like to share what's worked (and what hasn't) for me as well. We have a couple camps - one is mine the other is my cousin's. Our families and friends hope that they will be standing and active for generations! Our hunting camps are about 25 and 30 years in at this point. Our land has been in the family for many many years (1829) - but has had no house on the property since 1943 when the homestead was lost to fire.
We went with two distinctly different styles. The first was started as a 12x12 cabin on skids, and has been added on to several times in the 30 years we've had it in place. It's now 20ft x36ft The whole cabin is built on interlocking treated wood skids. We didn't build it with longevity in mind but its held up well. I would not suggest this style because some day it will be an issue wihout a foundation or pole barn construction. But it was inexpensive and easy to add on to. We did build it on top of a rock pile/stone wall that was on a field edge - that has helped as it's aged - but it does move and heave with winter!!
I love my cabin and wouldn't trade it for much! Memories at camp are priceless - we have 100s of pictures from day 1 until today that we keep in an album for visitors to thumb through - It has a kitchen/dining area - a couch/Recliner/Tv area - a bedroom with three beds and a bathroom with a shower and flush toilet - all on generator and 12 volt power separate
My Cousin's adjoining property cabin - was started as a substantial polebarn and several rooms were added inside on two sides - like an L-shape ( two bedrooms - a great room and a bathroom).
His plan is built with a better long term outlook. and he has room to add-on internally - and LOTS of pole barn storage inside.
If people are interested I'll draw up the layout for each as best I can.