Hi and welcome to the forums! You are wise to inquire about adding a bike rack to the bumper. I can't speak for every unit but from previous discussions it seems that some RV bumpers does not support the weight of a bouncing bike well. Others members with more experience should be chiming in.
BTW - congrats on your new RV!
Great choice for "Living within my means" and camping for one...
2011 Salem Cruise Lite 20RBXL & 2011 Toyota Tundra Dbl Cab
Camping History: 45 Trips / 133 Nights / 3736 Miles
FRF Social Group: Campers of the West