Just passing through and thought I would offer up some ideas, based on our experiences (This is the Glen part of Katie and Glen - Katie is the major planner). We do DxDP and plan things in detail, so not all of what we do will apply (or even be enjoyable from your angle). Hopefully some of the below will be of use when planning.
I have found that WDWinfo (a partner of the DISboards) has all the info I could ever want and then some about each park and the resorts.
1. My son did NOT like Dinosaur. After riding once with his head tucked in my shoulder, he agreed to try it again (like the trooper he is), but no success... he got scared. In hindsight, I regret asking him to try it a second time (he was not upset after we got off the ride, but I was sad that he did not enjoy).
2. Food wise, Flame Tree BBQ is a MUST stop for us (our favorite). Since you are on QS, this may be OOP for you. Regardless, I think it is one of the better places to eat lunch at AK. If you are getting there for rope-drop, it may be worth considering an ADR at Tusker house - it is they normal buffet, with chracters. However, depending on when your ADR is, you can get into the park before rope drop and be inside at / before and get earlier start. Avoid Raintree - we were underwhelmed by it.. same as a Raintree in any city.. nothing special.
At the Poly, We LOVE breakfast at Ohana.. a must do on every trip of ours (ok, only two, so far.. but there will be more!!!

)
3. Maharaja Jungle Trek is a walking tour that features bats, komodo dragons, bats, deer, birds, etc.... Did it once and don't need to do again. Kinda neat if you are into that, but I would do the Kilimanjaro Safari personally.
4. If you are into it, you may also want to check out Flights of Wonder. It is a bird show and is amazing. My Son also enjoyed the train ride to Rafiki's Planet Watch.
I have stayed at the Poly on business (overflow hotel for the CR). If you want to eat at Ohana, you will need an ADR - no way to get to it otherwise. (Sinc eyou are staying there, it might be something to consider early one morning). Having said that, I was perfectly content to eat at Kona when I stayed there (eating solo, I had a 20 min wait max, but service was quick and food was excellent). The Kona coffee stand is one of the few places to get REAL coffee on property (as opposed to Nescafe podwer junk...

). And at the coffee stand, you can get real Kona coffee
You will find a bus from your resort to every park. Being a monorail resort, you can take the monorail to MK and TC, where you coudl transfer to the epcot monorail or a bus.. Here is specific info:
http://www.wdwinfo.com/wdwinfo/resorts/polytransportation.htm
Note: my wife will likely log on later and correct any errors I make