I just got the Cabelas alaskan guied series pack/frame for Pretty cheap. It normaly goes for around $220 I got mine for $150. Its 5300 cuin, that might be a little bit for what your looking for but they do have a 4500 cuin model too. Another one to look at would be Badlands 4500 or any other model, thay are grat packs, also eberlestock. You can look at cabelas.com for all these packs. you should be able to find a good pack for that price, my advice is to try on as many as you can to see what one fits the best.
If you decide to go with the Cabela's Alaskan pack, I can save you some money. I bought he frame to pack out moose with but never used it. It is just gathering dust in my gun room. Cover the shipping plus $20 and its yours. I paid $50+ for it several years ago....
Let me start off by saying I am not a farmer.
I am a deer hunter and I do own a tractor and have all of the equipment - but that does not make you a farmer any more than standing in the garage makes you a car - well, you get the picture!
Having said that - and with most of my ineptitude fairly well hidden - I do think that buckwheat is one of the most under rated cover crops out there.
I say cover crop because I see mixed results as it relates to the deer eating the plants.