I tend to agree that lifting it up is the biggest challenge. These bikes are not only heavy, but extra awkward since the weight is distributed so unevenly. The fork should be completely fine with a front wheel block, as that is how most of them ship from the factory anyway. Hydraulic brakes are a small consideration to convenience, and if you don't pop a shim i there when the front wheel comes off, you can inadvertently squeeze the caliper shut and it's a pain to back it off for reassembly. Just a consideration that will save a couple of expletive-laced frustrations at the trail head.
There really are quite a few hitch options for these bikes, and if you search around here there are several threads on ebike hitch alternatives. But if you really do want to go for the tonneau option (and there are good reasons for it, like freeing up the hitch for a trailer when camping, etc.), I might suggest a tray rack like the Yakima Front Loader. I used to have a slightly lifted F150 with a Lund fiberglass tonneau (wood core) that I mounted a full Yakima round bar rack onto. I had two Yakima front loaders, and they were much easier to roll a heavy bike into than any other system I had tried. Since the tray helped guide the wheel, and the tilt up brace automatically closed on the tire, it was a simple as rolling the bike forward until it stopped. I could do it standing on the tail gate quite easily with a couple of 40+lb full suspension downhill bikes - the Rad 5 is probably ~60lb with the battery removed? The system was solid and it kept my tailgate free to open, and my hitch free to haul.
But before you buy anything, get the bike and make sure your back will be happy with that approach first. ;-)
