Hi Herman,
Are you on honeymoon? Just a tip, you can inform the hotels + airlines beforehand if you are, and some will either give you:
Complimentary gift baskets
Room upgrade
breakfast
celebration cake
So are u collecting ur car in SFO, then go hotel park whole day? Remember to do ur research for free/cheap parking in SFO, else it will drain ur $$$... Amongst my 4 states, SFO parking is the most $$$! Fyi, my hotel valet allows parking for usd58/day, but the multi-storey opposite charges only usd32 across the street.
In LA, self-drive sight-seeing? I went BH & Rodeo drive ... dint go Melrose Place & Hell's Kitchen.
Shopping:
I have the same thought as u initially...
http://en.wikipedia.org/wiki/Sales_taxes_in_the_United_States
But i was wrong! Despite the higher Cali tax, Nevada charge more, which i dun understand why. To make things worse, different stores seems to charge different sales tax, even if they are just beside each other.I can email you some of my receipts, let u have a look... do PM me your email if u want to see.
Also, there maybe chance that some merchandise u saw in Cali, are not avail in Nevada(LV). By then, you will regret... also, i enjoyed 25% disc for certain brands in premium outlets, which Nevada dun have.
My whole USA shopping loot are from premium outlets. Once you enjoy the cheaper disc, you WILL NOT want to ever touch LV retail outlets, trust me. Unless you are those that wants latest design, then bo bian. Else, i got my Levis for USD49 in outlet store, but selling usd100+ in LV stores. Hope you get my drift...
Lastly, buy Oakley! I got my RADAR frame for USD220, which retails for SGD485!
Personal opinion: Zoo more boring, Singapore also have. But Seaworld is something famous and have marine animals unique to the region.
http://seaworldparks.com/en/seaworld-sandiego/Book-Online/Tickets/SoCal-Resident/Multi-Park
Should buy multi-park tickets if you are a theme park fan... i got seaworld+ universal studio combo.
Left-hand drive: Just 1 day is enough... start slowly, dun tail-gate so that you can see how and which lane front car turn into. Fyi, the signal/wiper switch are in opposite place also, need to get used, unless u already driving a continental car in SG.
GPS: Once you get hold of the GPS, you may want to start keying in all the POI into it, to minimize time lost while there.