Welcome to the site! Seems like everyone has a Bigfoot now! IMO, the Hustler Bigfoot has the potential to be the most capable 6-wheeler in existence. My reasoning is that you can fit VERY large (both tall and wide) tires underneath it. If you are careful about not adding weight and maybe eliminate some, you can get your exerted psi very low. Plus the Hustlers are built pretty tough, and you just feel cool sitting in that 980!
As far as the rollcage, extra weight is always bad in the tough mud...but in reality, you will probably not find anything you can't handle with regular hunting travel. The mud parks are another story...every pound of weight and inch of tire width counts. So, you'll just need to figure out which type of driving you will be doing. Maybe remove the cage when hunting season is over??
As far as tires.....IMO, Vampires all the way. You can fit 26x13-12 tires on that 980 easily. They rock in the mud and swim good enough.
Congratulations on a nice machine! BTW, 6x6world member Mudbug and I ride in East Texas if you ever want to come down. And WildTexasRanger is planning a get together in November in East Tx??
Hammers should have warning labels.