Help with big bore stages

[winchets]

we want to host a bigbore friendly match next month we dont have a long range if fact we only have one target at 100 yards the rest would be regular sass distances with a max of about 50 feet for most of our bays.

I want to encourage the guys to bring their 30-30----45-70 and write the stages with 7 rifle  10 pistol 4+ shotgun.
other match directors have done this in the past to celebrate the oct deer hunt. Any ideas would be appreciated.

The one long range target is a 3' x 3' buffalo plate up the hill in one of our bays

Thanks
Chester