"We've arrived", "We're here". Or add 'finally' if you've been looking forward to getting there for some time and you want to show your enthusiasm at getting there: "We've finally arrived !", "We're finally here !". More casually, you can say "We (finally) made it", or "We've (finally) made it" or "We (finally) got there".

hi bill can i say here we are for emphasis?

we are here