On my previous TV (2008 GMC Envoy Denali) I had a front receiver installed and used the same carrier used on the rear when not towing the camper. I did not drive at night but I suspect the build up on the lights
that 'wipe away' never took off obscured more than the bike. Most road and comfort bikes do not have enough scope to seriously impede air flow and I never noticed coolant issues. One can always remove one wheel and re set the bike if any of those problems occur.
Front receivers in class 2 and 3 are available for just about any body on frame tow vehicle - all trucks and GM SUV's for sure.