guide (someone or something) across
To help someone or something to cross something. Hey Stu, can you guide these guys across the river? I think you're going to have to guide that little boat across—otherwise, it'll tip over.
guide someone or something across (something)
to lead or escort someone or something across something. I had to guide him across the desert. The bridge was very narrow and Jill got out to guide the truck across. We had to guide it across.