Sara - I can't find where right now, but the bible talks about us getting a new body...or being made new..(it's late, so I can't think of it properly right now). I think firstly, if it mattered, the bible would be clear about being buried and preserving ourselves well, but I don't think it will matter - think of people who die in fires, who are blown up, who are cremated, who are disabled, whose bodies have deteriorated in burial, who have lost limbs/had organs replaced...many people die with broken bodies, or no body, and I don't think that will cause a problem for God who knows how to make a perfect body for each individual.

Once again, I don't have a reference (others are more than welcome to fill in my bible blanks!), but the body is talked about in the bible as a vessel, a tool for earth. Sure, also a temple that we have to take care of, but I get the impression that it's a very separate thing to my spirit/soul. That my salvation and next life have nothing to do with the physical body I'm in now.
That's just how I understand things as of now.