One advantage to remaining in LEO for these past 40+ years has been remaining under the relative protection of the Van Allen belts. Going through those on the way to and from the Moon wasn’t much of a challenge, because the transits only took a few minutes.
On the surface of a body, you solve the problem by going underground if the stay will be lengthy.
The problem with a manned mission anywhere other than the moon is your trip times are measured in months using chemical rockets. Basically, any serious proposal for going to Mars should involve nuclear propulsion to make the trip time and risk more manageable. As well as nuclear power on the surface because making consumables (air, water) on the surface will be necessary.
Also, it should be a semi-permanent self-sustaining outpost, since not just the travel time but the travel cost is exorbitant.
I don't see it in our national will anytime soon.