Hey chuck.I'll answer your questions in order.
1-No camping
2-There are 4 gates to enter Ft.Stewart,and then several accessgates to go on base.The 4 gates are located ....2 on hwy 144,onecoming fromof Glennville,one coming from Richmond Hill.One on Hwy 119 coming from Pembroke,and one coming from Flemington(Hinesville direction).You only need a drivers liscense to get in through these 4 gates.If they ask you anything tell them you are going to pass and permit to get a huntingliscence.If you were to enter the base you will have to talk to the gaurds at the base.I have only went on base one time to hunt a section,and all I did was show them my Hunting pass,and filled out a temporary 24 hour access pass.10 minutes later you're good to go.
3-The Check in Station is about 15 miles from Richmond Hill on the right.I don't think you'll have ahard time finding it.If you start to see all the newly built houses on the left you have went too far,turn around go back toward Richmond Hill...
4-I would go up I-95 until I got to Richmond hill,and get off at 144 and come in from that way.Depending on what area you hunt...would be as to where I would rent a motel.Hinesville should be cheaper than the Interstate back at Richmond hill,but I'm not sure.Also Hinesville is closer to the areas you specified that you wanted to hunt,so I would stay in Hinesville.
5-Whooowee.I'm glad we have technology.

You can now check in/out of areas by cell phone.They will explain to you how to do it.If you listen to the voice promts it is self explanitory though.The more you use it the easier it gets.No need to go to the check in station unless you harvest a deer/hog on Saturday or Sunday,or can't log out through the automated phone system.If that happens you sign out a sheet at the check station,and put it in the drop box.Also when you go in to get your pass make sure you have your hunter safety card.They were selling all State liscenses there.Hunting/Fishing/Primitive weapons..etc.
Also,there is a sign in sheet you will need to sign when you walk in.It is on the desk straight in front of you where the employee sits.Oh yeah,and don't forget to sign out or you won't be able to hunt for a week.I just got off of my 1 week suspension,and it's greuling.[8D]
2 more tips.
1-DO NOT hunt less than 100 meters(109yds)from a road.50 yds is state law,but as my friend found out it is not the same on federal land.$100 ticket.
2-DO NOT forget to put your large hunting vehicle access pass on your dash for the game warden to see who you are.$50 ticket.I leave mine on the dash 24-7.
It's really not that bad once you get used to doing it.Most of the rules are for our safety.There is a quota sytsem based on acreage of the area you are hunting.1 person per 100 acres.I like that.Good luck.If you need any more help feel free to PM me.