I' ve used a full frame Trek 820 aluminum for a long time now, I also used a cheap Walmart bike, a mongoose full suspension, I put a Judy bar and a new rear spring in it, and a new pumper, and took all of the old shimano components on it that I had laying around, (ended up costing about 100-150 less than a similarly equipped factory bike), and a Specialized trail saddle, it was probably the best idea i ever had. I always had the original parts if something broke, but it rode very easy and could climb out of almost anything I could fall into.

One thing I' m looking for now, is the Montau military bike, it' s a full frame (would take a judy bar), but it folds to only be as large as the wheels (27" x30" if I recall), and it weighs less than most aluminum frames I' ve ever seen short of road racers.

Important bike hunting tips: Always wear a saddle bag with a bike tool kit, first aid kit, CO2 powered tire pump, extra tubes or tube patch kit. On my Trek, it was my ' ride to class bike' too, so I had solid rubber tubes, not a really good idea for hunting, you don' t get flats, but you WILL bend your rims and the ride on a full frame bike with solids is NOT fun off-road, pneumatic tubes may get flats, but they are a lot better riding and weigh not even a fifth of that of solids, and the ride is much nicer. Don' t go where the ground is wet, because you tear up a lot, not good for our image and not good for the ground anyway. Mount ' brakers' on your handle bars (forward pointing ' tree deflecing' bars). Get metal pedals, in case you' d do something that' d break one off<-not handy for riding out. Get a new saddle, most saddles that come on bikes (unless a real high quality bike) aren' t good for trail riding, and can literally be a pain in the arse after a couple miles of rough terrain. If you ever use one for rifle hunting, keep your gun unloaded in a gun sock on your back, or in a soft case. You can also put a crutch tip over the bbl to keep from getting debris in it if you don' t want to pack it for a short trip.