Hi, Jeep -
There are a variety of room types. My favorite is Room 10 which is a nice, large, light room with 2 big beds, just around the corner from the pool, well situated but a little more private than the ones directly next to the pool. I think any of the rooms would be fine, even the ones away from the pool area.
A few times I've done the dinner/breakfast option and sometimes I've eaten at the little comedores instead - both work for me. I've found the food to be good to great at the Tikal Inn; others have complained so they are either pickier than I am or the cooks vary.
Although Roxy bases out of the Tikal Inn when she's in Peten and her brothers run the hotel, she is unlikely to be the guide they provide with a tour package. If you are interested in spending time with her you should book directly with her and then talk to the Tikal Inn about how it will affect the price; my guess is they'll tack on a bit to the usual package cost.
I've toured Tikal 3 or 4 times as well as several other area Maya sites - Uaxactun and Yaxha - with Roxy. She is incredibly knowledgeable and a pleasure to spend time with - a true gem. :-)
Edited: 6:31 pm, May 28, 2013