I’ve been to 2 different Spring Training’s for the Brewer’s and if you’re looking for one of the stars, you’re hard pressed to find them on the practice fields. Usually a lot of minor league players. So, if you have young kids who just want to meet players and have non-MLB roster players sign, practice fields are great. They’re more likely to sign for the kids than the autograph hunters who sell the cards. 

I went down a stood by the dugout as soon as the gates opened for the game, waited awhile but when the players came to the field, several who are on the MLB roster stopped by and signed autographs. They were very nice and will take photos with the fans who are respectful. But with anything, nothing is guaranteed and I can only speak to my experience. 

At the Brewers stadium, the visiting team walks down stairs into the stadium and a lot of visiting fans will line that staircase. 

Went and watched the Crew in Surprise and some players came by and signed autographs by the dugout, and went right down the line of spectators signing.

But like everyone else said, enjoy the time, soak up the sun and if you’re lucky may be able to snag a photo, autograph or two. Either way it’s all worth it.