Towbar advice

Hello,

I want to get a towbar fitted to my octavia estate 1.5tsi to tow a small camping trailer.

Should I be going to a main dealer so as to get everything working properly with rear parking sensors once fitted - or are people like Towsure perfectly capable of dealing with this?

Also, there seems to be some indication that a separate rear bumper replacement part might be required. Does anyone have any experience of this or know how one can tell?

What would you advise?

Thanks in advance for your help