The only IC hunt that ever worked was really Bocc and myself, and that only worked cause we liked each other and I'm not overly difficult as many of SL can attest to.
Personally I would get rid of IC hunt, but if it must remain, here are the guidelines.
1. Bring back the rule that the host must leave the village every two weeks for one day. This gives the hunter an opportune time to attack, and avoids getting a whole village involved (Never ends well) Heck the host can take bodyguards if they want, idc just leave the village. Perhaps like Kay's idea, a new personal village rank can be a jinch bodyguard? If the host wants they can even set up shop in a personal lair full of traps (Trev went to Mugen Castle) so they're not really losing any advantage.
2. The host is not allowed to hide their presence, no special seals that hide yours or biju chakra, nothing.
3. The way in which people finds biju is suppose to be hard, it needs to be more than sharingan or Byakugan, it needs to be hard. Ideally it shouldn't take any chakra skills, but rather some espionage. Ask around the village, use a technique like Orochimaru did during the chuunin exams and disguise yourself, be a damn ninja and find out info. Kidnap a village member and give em back in exchange for info, something.
Half the problems with IC fights come from 2 and 3. Challenger says I used so and so technique to find you, host says I used so and so to hide and what you did was not legit, etc, etc.