Why not just shorten the season to the first 7 days of October. Exactly, why do you need a three month season if you're good and tag soup isn't an issue?

Must wear nothing but a loin cloth and have one arm tied behind your back. Exactly, you do not need clothes and two arms if you're good and tag soup isn't critical!

No hunting over food sources of any kind. Exactly, get them crossing water sources if you're good and tag soup isn't an issue!
No weapons except your bare hand. Exactly, sink your teeth into thier jugular if you're good and tag soup isn't an issue!

Why hunt them when their guard is down and they have nothing but poontang on their mind?

Can you elevate the diffivulty any more than that? YES