I played up in camps in the spring and summer nearly every year from the time I was a first year squirt until bantams, and I played up my first three years of baseball. It was fine.
I improved at hockey because I played with kids that played at a faster pace, and I enjoyed the competition. It made me a better hockey player. No, I'm not Wayne Gretzky. I'm not even Brent Gretzky. But I was decent, and I honestly wish I had played against older people for longer in the spring and summer.
As a side opinion, I feel like spring league is a waste of time, and even more of a waste if you aren't going to play all summer.