This guys idea for a "semi log cabin" look building gave me an idea for building a temporary small portable cabin or blind for a deer lease. http://www.small-cabin.com/forum/2_599_0.html
Our first cabin was only 8x12, plenty of room to sleep 4. It would be what I would build as a portable. Using no glue between the homemade logs would allow you to take it apart and haul it on a trailer. The "logs" would fit together like a big Lincoln Log building set. Using a shed roof with the back side slightly lower than the front would simplify the roof, covered with roll roofing. Bottom row of "logs" made out of treated limber to prevent rot. Floor could either be dirt or stone pavers. If you lose the lease, take it apart and haul home with you.
Instead of using the 2x8 for the wall construction use 1x8. The walls would still be 2.25" thick, plenty thick for a small hunting shack. That would give enough width for a slab door and strength for window openings.