Thought I would chime in as I had the same thoughts as you regarding topping my 100 lb Fisher 1232 onto my lifted Wrangler and didn't find many answers from others with first hand experience. After trying it out, I confirmed that I can manage to load and unload the boat by myself.
I'm 25, 5' 8" and about 160lbs. My Jeep is lifted a couple inches with 33" mud terrains.
I can fairly easily lift the boat (from being on its side) onto my shoulder and walk with it. To get it onto the Jeep, I carefully set it down on its side behind my Jeep. Then I carefully lift and turn the front up to the roof rack and walk to the rear of the boat and slide it up and on top. Strap it securely and safely as mentioned above. Taking it down is pretty much reversing these steps.
If you buy or make a type of boat dolly/wheel cart that you can set the rear of the boat on, it would make the task even easier to do alone. This would also help with the issue of loading the boat after a long tiring day of fishing.
Obviously, it is going to be easier to have help, but there will be times I will go without a partner.
Hopes this helps.