So you can drive the car on the road but need a trailer for insurance if it breaks?
If so, I am sure you could work out something with some people who are expected to be there in 2015. The other option is to wing it to the event. If it breaks, hire a one way trailer then hitch a ride!
With the heat issues, you could just take the engine cover off? One thing for certain, I will not miss this headache next time round..