Hey Marfani,
9 days are too much if u r visiting in 2nd week of may,
Food is not an issue.
May is not the peak season so why don't u get the hotel u can easily get the hotel in between 2000 to 2500.
Many hotels also have tent arragement in peak season, so better is to get the tents from them on rental, because in May its extreme cold in Arang kel and Taobat, u wont be able to sleep if u dont have sleeping bags and proper tent.
Regarding the food, food is not an issue, u will get everything u want, thanks to shan masala nowadays even in remote areas all cook the same taste. Still if u want to carry, so best solution is to get the fresh mate pakced foods, they are not canned, they are packed in aluminium foil.
What is ur mode of transportation ? and budget, if budget is not an issue so i suggest hotels.
You need to hire jeeps if u want to go to kel or taobat.