Well first off you'll have to visit the TAD store while you are there. There's also a good German place to eat. Like any big city, there are the street problems. I go up to SF a few times each year and spent a long weekend there earlier this year. No problem with a tac folder clipped in my pocket, or carrying EDC bag or daysack. It's a tourist/visitor rich environment so no body looks twice at people with shoulder bags etc. Waving swords, machetes or kukris will get the attention of the SFPD. They patrol pretty heavy in the downtown and tourist areas. Be more carefull at night. It's an anti gun haven, so don't bring any. Pier 39 with a USN Submarine and Liberty ship is easy to get to. BART and the Cable Cars get you around pretty well. I'll get some specific info together and PM you tonight. The old US Army Presideo is a fun place to wonder around and there's a outlet store for outdoor gear there. across the bay you can tour an Aircraft Carrier, redwoods are close, too.
Dave