Kentucky Derby Advice Needed

Planning a trip to the 2015 Kentucky Derby for 2 people.
Need some advice from people that have gone before.

I've been doing most of my pricing options research on www.derbyexperiences.com/2015Derby
Is there a better website to use? Do you recommend doing the travel/transportation details on my own?

Is there a certain grandstand height that is required in order to see the race?
(i.e. Need to be in 200's or 300's to see anything?)

Some of the seating is not covered.... are there any tricks to getting shade? Or are shaded seats a must (especially for rain)?

The Party, Grandstand, and Clubhouse Packages all list Hospitality Venues, but only one has private bathrooms listed as a feature. Is it just an oversight that the others don't list private restrooms?
Are the bathrooms accessible and lines reasonable?

Is one hospitality venue preferrable to the others?
Secretariat, Affirmed, Citation, Sunny's Halo, Smarty Jones, Street Sense.

Is there a price point where the value doesn't match the pricing increase?
Red grandstand is good enough; it's not worth upgrading to a lounge, free drinks, and cover for $1k per person.
Or... Orange grandstand is totally worth it for the first experience b/c the lounge and cover is worth the money.
Etc...

Thanks for your help!