I don't think the heat is an issue. We have an RVQ that came with our 26BHS and it is attached with the back of the bbq resting right up against the exterior wall. The only issue we ever had was that it is located directly under our bedroom window, and it was open, so some smoke came into the TT. Proximity with the arrangement you are referencing is a non-issue.
2007 Jayco Jay Flight 26BHS
2005 GMC YukonXL Denali
4 6-volt batteries - 440 AH bank
Magnum Energy MSH-3012 Tri Metric 2025
Yamaha EF3000iSEB generator
Winegard Traveler DirecTV slimline HD SK-3005