Not a good idea to cover it right after a ride. Not only will your bike be dirty with road crap it will have a ton of bugs on it ! I always debug my bike while it cools down.
I'd stay get something other than a plugged tire for the track. Usually trackday riders post up really good used tire deals on here. I'd say an Easy up is almost a must,especially when it's hot out !
LED Specifically the Samsung,seriously the best picture I've ever seen. Ask if there are any open box at stores, Mine was half off and everything inside was still sealed!