There are many discussions on this very topic. Oddly enough, if they are small, the hot/cold cycles will not completely, but partially smooth the small ones out over time.
Larger, you can try to pull them out, but unlike steel that can be pulled out, and bondo'd smooth and repainted, alum once it deforms there are really only 4 options:
1) Go to JC and have the panel replaced
2) Go to JC and have a panel overlaid onto the damaged panel
3) Do your best and live with it
4) Insurance company totals it as the cost to repair exceeds it's slightly depreciated value, one small panel overlay can cost upward of $5k to $7k and more for larger panels or of course multiple panel replacements add up extremely quickly.
Airstream trailers with the iconic shells are not like cars. Sure you might have some limited success at pulling some out with suction, but even if you could get to it from the inside, that would require you to pull the interior skins off, pull the insulation out just, remove roof lockers or attached items to get to it and on new trailers with the quietstream A/C there is an additional layer up top (and I think some returns somewhere on the walls too) I don't know even how that would come into play here since I have not been to the factory to see construction of these newer designs. This makes approaching it from the outside really your best and only reasonable option unless the insurance company totals it, but AZ is right, some pics would really help us tell you how bad. JC will want pics too in order to give even a basic repair quote so your insurance can decide what to do.