Had a corner bed in our first trailer. After a while, began to hate it. Then after the "beginning" was over, we just hated it. Sold the camper within 3 years of ownership. Never again.
No easy way to make the bed. Once you get a fitted sheet on the mattress, use a sleeping bag or if you use blankets, fold them up when done, spread them out after you get in bed.
Sleeping bags are great too, IF, you don't mind being extremely hot in them.
If you are single and sleeping alone, it won't be quite so challenging.
But ... we also hated the claustrophobic, closed-in feeling, like in a tomb after a while too. And no way to dangle our feet over end. Trailer got sold!