Plan all meals. Depending on how long you are going for, you may have to dehydrate most/all your food. (ground beef, textured vegetable protien, veg works the best) No cans or glassware is allowed so try not to pack any in.
My friends and I usually do 5-7 days hikes/portages and we'd bring in fresh stuff for the 1st day (steaks and stuff), but the rest of the trip will be rehydrated stuff.
Breakfasts: instant oatmeal, instant coffee/hot chocolate, bannock
Lunches (usually quicker on the trail stuff): kraft dinner with veg and some kind of meat, instant noodles, breads and spreads
Dinners: pasta and sauce, fajitas, rice and stews, steaks and mashed potatoes
Those are the easy meals that I'd recommend for people without much experience back country camping.
Always hang food in a bear bag and search for a good spot before it gets dark. Bring good rope and extra incase things get hung up and you lose some of it.
I back country camp in all seasons and have been all over Ontario, eastern US and a fun little trip up to Nunavut.
I'll check back if you have any other questions.
Allan