Always check with the park, or on the website. I used a tent last year at the beginning of Aug after they lifted the restrictions. Have fun when you go. https://www.nps.gov/glac/index.htm
You will have to check with the Park themselves. Last year because of high bear activity tents were banned only hard sided campers were allowed. That happened towards the end of the season.
I'm not sure because I didn't stay in campgrounds. I did run into Bear though.
Thanks! Your answer is awaiting moderation.