OldIHC

What do you guys recommend for a bed? Also what do you recommend for a rear bumper?

What kind of bed?. If you like a flat deck, try auto recyclers for a good used deck. Craigslist might have something.
For a rear bumper, maybe, try an aftermarket step bumper. Craigslist might have something.

I like the set up on this truck, removable sides make it versatile and you can't beat having a dump bed if it fits the budget. For a bumper a piece of 4'' channel
would not look out of place but if you're a welder the sky's the limit!

I like a queen, it is long enough for me to sleep without my feet hanging off and large enough for me to have company spend the night.