thats a great idea walking with a pack on your back with weight, if you can get on a stepper with that too, that will help
have to remember, a LOT of hunting for many things out west happens at elevations you ain't got in FL. too, and to many flat landers that thin air is a work out in itself, better shape you will be in , the better you will be when you get out there,

I also think you really need to PICK a animal you want to hunt too?
there are many critters closer than MT
but again if you want the BIG west experience and scenery, you need to drive them extra hours to get it?

SD has some great mule deer hunting, but the scenery is far from what you have out west in a ELk hunt or MT mule deer hunt

if you want to go SD, look at some of the Indian reservation' s lands, tags can some times be easier to get, and you can then TRY and DRAW a state rifle tag(if rifle hunting is your goal), and then you can make the trip into a two buck trip? making it maybe more easy to swallow the costs and time to drive out?