Too bad you won't get there earlier on Friday. I love going to the show on Friday morning to avoid the crowds and hit the booths before the throng gets there buying everything up. BUT, since you are from New York you wouldn't be able to partake of what we here in the freedom loving state of Kentucky take for granted.
If you get in on Friday go to the show as soon as you can. Saturday gets very busy but as long as the weather isn't too bad parking is not an issue. They have large parking areas in fields, well directed, plenty of room, and they run shuttle buses so its not bad at all.
Crowds this Spring should be OK. Back in the gun hater's terror years when everyone worried about losing their God Given Rights masses came to the show. Now that we aer in a more quiet time things will go better. We are in Kentucky, not NY so "crowds" are nothing bad for us. People are polite and we don't crazy or anything.
Bring ear protection, it get noisy! You will hear sounds you will never get to experience back in that Commie state you are forced to live in.
Don't worry too much about traffic. I have been to NY, what we have here is NOTHING like what you put up with back in the big cities of the East.
Tons of good places to stay. You can read a map and find these on-line. Don't worry about the "West Side". Its tame compared to some of the big cities up East. Louisville is not so large a city. I live on the East side and its really lovely and peaceful here.
You say you don't have too much time. Well, maybe you should make some time and come back when you can stay a spell. You might find this a beautiful area and see why the people from out East use to migrate here.