lol. I've never heard "fun" and "SERE" in the same sentence before...
I taught SERE at the zoo for 2 years, so here's my input...
"Fun" at SERE is 100% about the attitude. If you're a city boy who's never seen the milky way and you get all faint at the thought of eating something you just picked up off the ground, then yea its gonna be rough. On the other hand, it is EXTREMELY unlikely they're gonna let you die out there, so the best approach is to go into it with a completely open mind and be willing to accept, embrace, and most importantly, TRY everything they tell you, without reservation. Throw yourself into the experience and you'll find that it really can be fun. It's the people who resist the instruction, scoff at it, think they know better (hey I was a rock climber so I'm an expert in the mountains!!!111one that sort of thing), or otherwise don't take full advantage of the program who end up miserable.
Think about this - rich people pay thousands of dollars to go do, for fun, what you're gonna get paid to do.
Examples - when they give you instruction on what is edible in the local area, treat it as a no-kidding scavenger hunt, and try to find and eat one of everything on the list. Get that over with before you someday find yourself in a situation where you need to do it to survive. When they discuss shelters, clothing protection/preservation, set yourself the task of making the best danged shelter you can, so you can see for yourself what works, what is effective, what is a total waste of time. When you're standing in 3 ft of snow wearing nothing but a flight suit and a ejection-shredded flight jacket, that's not the right time to guess or experiment with what kind of expedient shelter you can make quickly before you spend even a moment on a "better" but more time consuming plan.
So. Try EVERYTHING. Not kidding. Eat that damned rabbit eyeball, and turn the skin into an improvised glove. In your "spare time" after dinner, grab your knife, a bone shard, and some rabbit tendon (you DID save some before throwing bunny into the stew pot right?) and see for yourself how hard it is to sew rabbit skin together. Save the bunny brains and see if you can tan a section of rabbit hide with it. Make a fish trap if you're near water.
I guarantee that you'll learn more by trying stuff out, and you'll be busy enough that it really will be interesting/fun instead of an exercise into how miserable you can convince yourself that you are.
As for food... Again, get over it. You're not gonna get enough "real" food to keep from being hungry, but you WON'T STARVE, so just get over it before training starts. No whining. If you're hungry, take that list of local edibles and go shopping around your campsite for some home-grown eats. But get over it before you even show up, because there's no mercy from the instructor cadre. And the miserable food whiners are irritating as f**k because you can't hide from the fact that they're not paying attention and will be a total drain on group resources if they ever find themselves in a real survival situation.
Night navigation - good luck, go slow and don't fall into the creek. If you get lost at night but figure it out at sunrise and execute a prompt plan to get back where you belong, they probably won't make you do it all over again.
Even resistance training... Go with it, try stuff out, all the cool kids are doing it. They'll tell you if you're fouling it up, and just remember you won't be the first to make whatever mistake it is they say you're making. Take mental notes during academics and make a point of trying out the various techniques you're given to cope with certain situations. That won't make shivering in a too-small box any more pleasant but it'll give you something to do in between hallucinations, even if all you're able to do is make a makeshift sun-dial out of cockroach parts to try to keep track of time
