Same here. But a word of advice, plan the ride early in your trip so if you get rained out (like my DH did

) you can reschedule for later in the week. For my DH the only day he could reschedule to was our last day and he opted to take a "rain check" which he ended up using back here in Michigan that spring. He ended up being very happy because MIS is a 2 mile oval and he could get up to faster speeds than on the 1 mile oval at Disney.
The day he got rained out he had to take a cab from BWI to the speedway to get his rain check (he could have rescheduled over the phone). The RPE guys were so nice. They gave him a ride in the track van around the oval and in the pit area. Then they gave him a ride back to the BWI rather than drop him at the TTC.!!
When we did it at MIS it was awesome. The RPE staff is so helpful and friendly. They made each guy/gal feel so special and they were great to the kids and non-riding spouses. We got a ride around the track and got to stand up on the elevated pit row roof so we could film our riders.
I highly recommend RPE!