hi R.-
just got back from dw this past sunday and my 2 year old had a great time. we stayed at mystic dunes which is less than 10 minutes from the park. had to sit through a 90 minute sales pitch but the 3 nights we were there only cost $50 for the whole stay. just went with the park per day pass and if you're not staying on property-i'd say go that way otherwise you'll have to pay for parking everypark you hop from. at first, i thought the choice of tix was a mistake but like i said with not staying on property, it would have been a pain to pack up, get in car seats, etc. and waste travel time getting from one place to next. fast pass-definitely! not sure if you plan on utilizing parent swap at lines your 16 month can't get into, but at epcot use it for soaring!. you're only allowed to get one per 2 hour period or after the one you have in hand expires-it will make sense one you get there. at magic kingdom-jungle cruise, peter pan, and again if big rides, space & splash mtn. there are only a certain number of fast passes available per day so they do run out and you might have to get them for the busier rides earlier in the day. ie-for jungle cruise, i got the fast pass at 12 and entry time was not until 640-so they go fairly fast. also, utilize the photopass-there are a bunch of photographers throughout park at 'picture spots' they give you a card that can hold hundreds of pictures and anytime you want a pic taken just give them the card. you look on pics online-they are pricey but of great quality especially since you can design your own borders with graphics and stuff. my son and 2 year old niece definitely enjoyed the parades and shows (especially at mgm) most. overall, i think the crowds could have been alot worse and 3 days weren't enough to get through the park but still got our fill and would call it a successful trip. have fun!