Since I am celebrating my one year anniversary, my advice is make a budget. there are a billion things that will want your money right now and you get to prioritize what you want.
Have either of you been to
Disneyland before?
Are you the real active don't like to sit around types?
Or the sleep til noon, move about a couple hours, enjoy some drinks by the pool types?
If money were no issue whatsoever, then staying right in the middle of the action at the Grand Californian with concierge service would be the ultimate in relaxation and pampering.
If you'd like a very posh experience but don't want to spend over $400 a night to get it, you might look into the Hilton or the Sheraton. They are a bit farther away but are very luxurious hotels that offer shuttle service.
If you stay onsite, you're right near Downtown Disney too with lots of entertainment options.
Are you planning on driving around to see San Diego or Hollywood too so that staying near Disneyland is more like your "home base"?
BEST of LUCK towards your upcoming marriage!