For loud sounds, you might want to consider taking ear-plugs or ear defenders along with you, for use during fireworks shows and other things with loud bangs. Some of the live actions shows and rides (such as Backlot Tours and Indiana Jones) have some explosion noises in them, so watch out for these. I don't know how loud counts as 'loud' (if that makes sense), but if it would help, you could ask to sit towards the back in such shows. One that is surprisingly loud, is Lights Motors Action. The engine noise is roaringly loud, and the explosions in the show don't help either. However, if you want to see it, you wouldn't really miss much by wearing ear plugs, as most of the show is visual.
For parades and shows, try to position yourself away from speakers - if you need any advice on this, just ask a CM. Most of the shows are fine volume-wise, but some of the live shows and similar can get rather loud, if you're in the wrong place. Be aware that some rides have speakers in the ride cars - they're not particularly loud, but they are right beside your ears (Spaceship Earth and Haunted Mansion spring to mind).
Some rides and shows (such as Figment and Phillharmagic) have artificial scents in them, but they're not too, too over-powering, and only last for a few moments. If it might help, we can compile a list of 'spoilers' telling you which scents are produced where. Also, here is a
previous thread on rides with scents.
Some of the food carts, especially the turkey leg stands, smell quite strong, but it's not normally too bad if you walk on the other side of the path (I'm a vegetarian with nausea issues, so those stands really don't do it for me!). Some of the shows and attractions with fire or explosions will have a slight smell of burnt fuel, but it's not normally too bad. The buildings are normally all fine, as they've got air-con running all the time, keeping the air fresh and circulating.
I think the Open Mouse book has a list of rides with flashing lights in it, and
this post on epilepsy might also be of some help.
Technically, smoking is only allowed in designated areas, but one or two people don't obey these rules (most are extremely courteous about it, though). The smoking areas are all marked on the maps, and are normally a little away from the main path. At the resorts, smoking is also only allowed in designated areas, but I'm not sure if everyone is aware of / keeps to these rules.
I'm glad you've found such a helpful book, I've heard many good things about it! Just a couple of general notes:

Be wary of any ride with warnings for people with neck and spinal injuries, as these will usually have sharp turns or drops in them.

If you're not sure about any rides or shows, you will probably find videos of them on
YouTube.

Quite a few of the rides will turn you around slowly, to get you facing the right direction. This hopefully won't bring on an attack, but may be a little disorientating if you're already feeling a bit 'wobbly' (technical medical term

). A couple of rides go slowly backwards down a slope, with your ride car tilted back (not flat, just semi-reclined). I'm not sure whether or not this would be an issue for you.

You can apparently ask for the bounce to be turned off on the Winnie the Pooh ride cars.
You might want to consider getting a GAC, to have 'just in case'. You don't have to use it if you are feeling OK, but it might be good to have it in your bag if you need it. If you have a reasonably mild attack, that is bad enough to throw your balance off but not enough to stop you enjoying the parks, it could just give you that extra bit of assistance. Many people here, with all sorts of different needs, have the GAC as a safety net, which they only use if needed. Whatever you choose to do, just make sure you don't do anything you don't feel safe with - better to ask for help and find you might have coped without it, than to not ask and regret it later. The most important thing is to keep safe!