You can go back early to get them. The problem will be finding a place to meet them. The police direct traffic and you don't get much choice on where to go. IF you get there early enough, before they start shifting traffic lanes, then you should be able to get up to the track. Just be aware that everything is different out there on race day: if they are going any pre-race days they are nothing like Sunday. So many cars, cars, cars, walkers, drunks, police. It is so confusing and I've been there alot!
You will need to watch part of the race to get the timing right so you will know how many laps it takes them to run in about an hour. I think it will be 30-40 laps so you will need to leave when there are 30-40 laps remaining in the race.
The best thing would be if you could communicate by phone when you go to pick them up!!! They could walk out of the track to the road and stay along the side of the road. If you can communicate by phone you can pick them up. When you pick them up on Speedway Blvd, keep going straight and then turn right onto one of the county highways. If you get a good map, you can find your way back to Talladega, then to Hwy 280. We did this before but I can't remember the Hwy #'s. I think the right hand turn was just after the road that would take you to the race tracks airport. It may be County Rd 005. I'll keep trying to find some roads on mapquest that look familiar. I don't remember rd names, I just know where to go when I get there.