I would like to modify the answer provided by @ArtOfCode - While we can presently freeze bodies, the re-animation process is still not fully possible, and even if/when it becomes feasible, it will be quite some time until we'll be able to send a ship into space for a 10,000 year journey that they'll be able to reliably wake up from.
It is far easier to freeze embryos and keep them viable for a long period of time. It's actually in the realm of current commercially available technology (albeit at a relatively smaller scale and for shorter spans of time). We have also been working extensively on building cellular scaffolds for the purposes of observing cells in an in vivo environment.
My proposed addendum is as follows:
- Ship suspended animation gametes rather than any currently living humans. DARPA can already place rats in temporary stasis, so single cells should be easy.
- Upon landing on planet and setting up shop, use a robotic 3-d printer to craft scaffoldings for a roboticized human uterus. Since we can directly control design factors, we can easily eliminate any issues surrounding the birthing canal and general integrity of the womb.
- Combine the gametes together to get in vitro oocytes.
- Seed the robo-uteruses with stem cells cultivated from your oocytes.
- Feed the uteri with blood produced by stem cells cultivated into blood producing marrow.
- Keep the cells alive during growth with a nutrient chemical bath.
- Now you have a functioning human womb ready to accept a viable embryo!
- I guess, lastly, have some sort of caretaking robot that can help ensure the newly born, parentless humans don't perish until they can start learning to take care of themselves. Also, they need to be taught language and learn to read wikipedia. Caretaking robots for the elderly are already in limited existence. This is an extension and expansion of that same concept.
Almost all of these are things we can ALREADY DO with present technology at a decent cost!
The only major concerns are space radiation, machine reliability, and the morals/ethics of seeding a planet this way, I guess. You don't have to worry at all about maintaining a sealed, breathable atmosphere or avoiding high G forces that would kill a multicellular organism.
All in all, this would be the simplest, most immediate way (from our end) we could seed a planet outside the solar system with life.