For food allergies ,maybe just for precaution you could get your own kitchen ustensils,there are some companies like Orgran & Allergycare that have products to make quick meals,which are wheat.gluten/eg/sugar free.
I also suggest taking a multivitamin,Solgar has a really good 1,bit expensive though.
If you are sharing a room... tell allthe ppl you are allergic & if they have to use certain products to use them outside,depending on how sever your alleries are.Also a good thing to do would be to put a chart up of what ppl have to do if you go into anaphylaxis.
What foods & chemicals are you allergic to ?