Last year we took the kids to Disneyland and took the Surfliner down to SD, so we did SD last year
The fleet boat was top on MY list already
We have a 4.5 YO and a 7 YO, so we're sorta limited food wise to places that you'd wanna go with a 4 YO (we eat out rather more than we should, so the kids are actually pretty good in restaurants).
I'm always keen on local foodie places.