
So many questions so little time
FOOD REQUIREMENTS:- I personally use a basic mix by Johnston and Jeff
http://www.moreforpets.ltd.uk/johnston-jeff-chipmunk-wild-squirrel-125kg-p-615.htmlI supplement this with added nuts of all varieties such as you can find on most supermarket shelves and health food stores(Walnuts Brazils etc.) I also give them any soft fruit which is in season. They also enjoy Toast,pastry,cheese,eggs,pepsi,in fact most anything I take into the aviary which brings me on to.....
HOUSING:- I started many years ago with a purpose built cage which was 5ft high and 3ft square built into the corner of the living room in the house i was in at the time. It was easy to maintain regarding the cleaning but as I was naive about chips in those early days I did discover they liked plaster and concrete as they tried to eat their way out through the walls.
I progressed from there to an outside aviary which I must admit I now prefer.
On the plus side for indoor chips you can have much more contact on a daily basis as you can release them into the room where they will willingly interact with any members of the family present or indeed any friends or relatives.
On the downside for indoor chips you are usually confined in the same room as the chips when they are out playing as any opening is immediately investigated and they will invade the rest of the house, there is also the small matter of getting them back into their cage when you need them to go and their desire is not too.(but this is not so much of a problem when they are tamed to the hand.
I moved onto outdoor aviaries simply because i wanted them to have a more natural lifestyle, it also allowed me to be more expansive with their habitat.
I currently have 6 inmates in a 15ft long 6 ft wide 6 ft high enclosure which is essentially a mesh cube held up with wooden supports.
The plus side for outdoor aviaries is the amount of space you can allocate for each chipmunk to allow them room for self expression and storage space for their winter cache of nuts and seeds which can in some cases reduce friction during the autumn/winter months. It also allows the carer to interact with them on their terms. I have a wooden bench to sit on within the aviary and have many varied things on which they can play on and in.
The downside for outdoor aviaries is that you must be willing to wrap up warm during the colder days which means they have a chance to bury their nuts seeds etc. inside pockets hoods whatever and at times they will try to smuggle themselves out in loose clothing.
As for smells I don't think the chips mind how we smell to be honest

As for their own smell if they are indoors they can at times produce strong ammonia as they will often go to the toilet in one place but this habit is good as it can be used for training them to go where you want them too which can be a small corner toilet such as used in indoor rabbit,chinchilla cages.
Outdoor chips will of course react in the same way for toileting and will choose where they will go(usually in a corner shelf on which they can back up to)

I have found over the years that chipmunks have the same basic love of family as we humans have which is that some will always be great friends while others should only meet during wedding and funeral gatherings which should be completed without alcohol as quickly as possible.
My current crew consists of 5 females (mother and four daughters) and one unrelated male. I am hoping to get Jeremy a helper come the springtime. I also have access to some25 other chips who now reside with family and friends mainly aguiti but one or two dilute.
All the current crew are a dark cinnamon which is why they are all together as I am hoping to breed more cinnamon lights next year when I bring is a dilute to help out Jeremy but as I am no expert on genetics and species variations it is more hit and miss with me.
There are others on here who can tell you more about recessive genes and expected outcomes from various pairings.

As for buying chipmunks I think the accepted rule around this forum is not to go to a pet shop whose care and overall knowledge of the species is not of the best quality.
Many on here also advertise on pre-loved and gumtree which are nationwide.
As for colours....Aguiti/Cinnamon/Dilute are mentioned in this forum as they are the most prevalent there was one posting of a lady down south who has a black pair but no reports of them breeding.

Hope I have given you some ideas....