be crawling with sth = to be completely covered with or full of a particular type of thing爬满；充满；挤满。
rawl 基本意思verb (MOVE)
= to move slowly or with difficulty, especially with your body stretched out along the ground or on hands and knees缓慢移动；艰难前行；爬行；匍匐前进。

【例句】
The resort was crawling with tourists.
此度假胜地挤满了游客。

The child crawled across the floor.
那个孩子爬过了地板。