I think the most thing with a welcome pack is local information - a few restaurants, cafes, supermarkets, transport and taxi numbers as well as Wifi code, house rules. A map of your location in relation to all these things is also really handy. You could also include emergency numbers as well.
I wouldn’t get bogged down with all the touristy information you can get your hands on as your pack with become huge. Maybe a few leaflets or website suggestions of said tourist attractions instead, as each guest has different set interests and you can’t please everyone.
Little tip bits are also really good - for instance, late night openings of museums, art galleries etc. The best time to visit what and where, maybe your favourite places to visit and eat.
And finally, present the document in a clear way, make use of bullet points and space everything out! The last thing someone is going to read is a huge block of text and add a bit of colour as well.
I hope that helps!