I did TNR last year with a slightly modified Alpkit Airlok Tapered drybag, was great. Cheap, light, solid as a rock.
Scotland this year, want a bit bigger/more flexible so a separate harness & drybag. Was going for Wildcat but just can’t stomach the price so have just ordered a Blackburn, comes out just over £55 including a tapered drybag.
I wouldn’t use their front harness though, but I use an old school handlebar bag up front. I also avoid frame bags as they get in the way of large water bottles and those top tube bag things swing about and also just get in the way.