I wanted to thank you for responding to each of my big questions. I did want to clarify yes it is 5' at the top of my area not 5"! Ha
I wanted to note, in regards to space around the hugel, I have access to my gardening equipment with the rest of my yard so I don't need to consider any traffic other than garden traffic around the bed. I can't believe I didn't think of just lying sticks out to see how much space "felt comfortable". But I agree with your suggestion on allowing more than less to be safe.
I was also wondering about maximizing sunlight and planting space. Like you mentioned, should I just keep a flat bed or a hill to maximize sunlight? I'm terrible with spacial estimations and I'm unsure-- which option (flat versus hill) would get more sun(will the bed be shading itself?) And would I maximize planting space by building a hill or by keeping a flat raised bed? Any suggestions in your opinion?
Thanks so much everyone for reading and taking the time to respond!!