If you like camping, then you will enjoy the survival portion. I enjoyed it. Don't be afraid to eat stuff. If they say it is edible, then eat it. All the hiking will wear you out and if you have food aversions, then just cowboy up and eat what is edible for energy. No matter what, you are not goiing to starve to death. You can dehydrate, but they pound into you so much about staying hydrated, so if you do get dehydrated, it is a result of your own bufoonery.
Get a good pair of boots. I recommend wearing BDUs also. Pack only what you need.
As for resistance training, of course we can't say anything. All I can say is that I would rather go through the survival portion 3 more times than going through RT again. It is going to suck...period. Just tell yourself that it is not forever and be grateful that you do not have to go through what those guys in the Hanoi Hilton had to deal with.
I went through SERE back in 1993 so my info is probably dated, but I would not be surprised if most of it is the same.
Good luck and I can't say I'm jealous of you!