To help with the blocked vehicle license plates, you can use what I do, I bought a vanity license plate with the SAME LETTERING INFO that is on your legal vehicle plate, I then attach this vanity license plate on the bike in plain sight, so I won't loose it, and leave the State Original License plate attached to the vehicle. This is where I got the vanity plates from, that I use on both of my PU's.
https://www.amazon.com/dp/B06Y29GYR1/ref=sspa_dk_detail_5?
https://www.amazon.com/Custom-License-Plate-Personalized-Carolina/dp/B0F1Y7XSHN/ref=sr_1_40_sspa?
https://www.amazon.com/dp/B0BPK3YSYY/ref=sspa_dk_detail_4?
I have been stopped for blocked license plate once by our state troopers, once he seen what I had done, he laughed and said that's OK, after he checked everything out.
I had added LED brake/turn signals lights that plugged into my vehicles bumper plug, for the bike rack, so they were not blocked also. Here is more signal lights information I added to the bike rack, double signal lights now.
https://www.amazon.com/gp/product/B07YNZ97DF/ref=ox_sc_act_title_1?
I have had no problem in 4 states that I have traveled in, since using this system.
yrmv