As far as things such as parking, refreshments, seating, etc......
Parking is in the field to the north of the Training Complex. They have a service they use, so they will instruct you as to where you are to park. Obviously, the earlier you get there, the closer you will be to the facility.
The gates will remain closed and lines will form up to a few minutes prior to the start time of the scheduled practices. Usually they start letting people through about 20 - 30 minutes prior to the scheduled time. There are souvenir stands, concessions stands, interactive booths etc. in the parking lot as you walk to the facility. The also have all the water, Gatorade you can drink (cost is $1 per bottle)
Seating is on a first come first serve basis. They will have tents set up near the building, although it is limited. Most of the "seating" is on the hills on the west side of the facility. They will have 2 practice fields set up, and will use both at various times of practice.
There will be an autograph session, usually by position that is available for KIDS after practice. They will list which positions will be signing on a particular day. Obviously, it rotates throughout camp.
Cameras are allowed. VIDEO CAMERAS are NOT. I have seen them ask fans "to kindly leave the premises" after ignoring the warnings about video taping the practices. Alcohol is also NOT ALLOWED.
Hope this helps.