Hi chap, when I first started out I was swapping wagons daily and thus taking all my gear in / out but didn’t think it was to much hassle seeing as dash cam was getting good picture and sat nav was in ideal location. My dash cam is a NextBase 402G pro which I have no complaints about and had always done me well. Sat Nav I use just a normal Garmin smart drive didn’t bother with HGV specific sat nav as this does me fine asking as its used with common sense and a truckers atlas at times 
hth. Ryan