Hey there,
I also have Crohn's.
I would stay away from Living Clay and such other "cleansing" or "detoxifying" products because they most often tend to kill all the good bacteria in the gut you need in order to function. If you want to go the homeopathic way discuss this with your doctor, or if s/he is not into it, consider products that have some sort of testing behind them: probiotics, peppermint oil, etc. You can search for products on MedlinePlus (registration is free). I have used probiotics before successfully when I had a flare and did not want to go back on steroids. But everybody is different. (I would recommend the refrigerated probiotics since the shelf ones are guaranteed for bacteria only at the time of production not while they're on the shelf)
As for surgery, I'm wondering about the same thing. My docs are considering surgery. From everything I can gather, it seems that surgery can be a good choice if nothing else is working and since you're on both Humira and steroids, it sounds like you're at least getting there.
As for the weight gain - try not to stress too much about it. I lowered Entocort just recently and dropped 30 lbs in a few months. It will happen. Just focus on eating healthy (as much as you can) and exercising only when you can. I took up swimming now because it's easier on me...But walking is just fine for example. I think maybe the harsh exercise routines could be making you worse because you're just pushing yourself beyond what your body can handle at the time. (Also remember that steroids make you feel like you can do it, but it doesn't mean you should.)
You should talk to your regular doctor about sleep. You must get enough sleep and anything under 7 hours is insufficient for most people. I take medication for sleep and I'm quite functional. You should try it out I think because not getting enough sleep is not helping your body recover.
Feeling as a basket case - well, I've been there! I don't have much advice on that... I take it as lightly as I can and tell my friends I have 'roid rage... Humor is all I have to offer on this one!

stay well and let us know how you're doing.
best wishes,
forgetfulagain