Hi Adam Although we corresponded privately i thought I would also answer your questions from above and our emails here for anyone else looking into a flatbed hawk.
We are loving the flatbed/ pop up camper. We just came back from a three week trip Mt biking and climbing near Zion and Moab and couldn't be happier with it. We love how spacious it feels.
Only real negative is make sure the flatbed builder is good with making the gas easy to fill. Our guy in Oroville, CA was fantastic and tested it before we got it. He wasn't happy and made some changes; we really haven't had trouble with it filling too slowly. We do have to estimate the gallons and then pump slowly at the end or it spurts out gas when it's full.
Only other negative is we carry mountain bikes on the back and on rough, 4 wheel drive roads one of our handlebars bumps the back of the camper and has made a small dent. We added a foam cushion to the handlebar which seems to help a lot.
We have the scissor steps and like them. My 7 year old dog is still pretty agile and uses them pretty easily. He was super scared at first.
Popping the front and middle latches are super easy from the truck. The back ones are a bit of a pain - I'm a rock climber and it definitely helps. I can easily climb on our bike rack or bumper. I could also always bring a step ladder.
We have two small foldable steps on the flatbed near the rear tire (flatbed builder put them in) which are fantastic. For me and I'm only 5 feet, it makes it very easy to get in and out when we don't have the steps out. Quick in and outs groceries , getting into refrigerator etc. That was a tip from a fellow poster and can't imagine not having them.
We haven't had super high winds yet. Some moderate and all was fine. But not really tested.
Ground level to entrance approx 3 feet. I did get a 2017 F-150. I'm probably very close to payload. I put on E rated tires right away and air bags and it drives great. We've taken it on a few very rough roads and it's done great. No complaints on how the truck handles with the flatbed. We don't carry a lot of extra stuff / weight We don't have anything on the roof except two light weight - flexible 100 W solar panels which we are very happy with.
I love the cassette toilet for nights. So luxurious for me and makes a nice seat. We've camped in the low 30's and the furnace is fantastic for quickly heating things up. We haven't used it much but we love it. We got the outside shower which works well. We've used that when it's hot and we're back before it's been dark / cold out and love it. We've taken sponge baths inside when the temps made me hesitate to shower outside. Personally - I didn't like how the inside shower set up and the possible condensation issues. I also love the storage we gained by not having the inside shower.
We couldn't be happier with our choice; very happy we went with the flatbed camper for the extra room. We don't need to use the truck for other uses; if you did a slide in camper would work better. We also had four storage boxes built into the flatbed; very useful for tools, hoses, shoes etc.
​Good luck with your decision!