That deck looks like it can be fixed with: 1. A good sledge hammer - attempt to bang things partially back together. 2. Some good long screws or 1/4" lag bolts - following the same path as the current nails. 3. Joist hangers - these would do a great job! You may have to remove the outer "band" on the end....not the big pressure treated things that the joists are connected to, but if there is a 1x or something else on the end...can't see from the pic. - actually, it just looks like 2 - 2x10's, in which case you don't need to remove anything. The main job is really the hammer and the hangers. This is a fairly easy repair for any carpenter......or even a good handyman or some friendly neighbors. Heck, if you were within a couple hours of up here, we'd easily be able to come over and "party on" with those sledges and get things repaired in no time. The thing to remember is that this is not concrete - wood gives and moves very easily - both out of place and back into place. Note - this repair does not consider the uprights, which I cannot see well. But that part is relatively easy also. Some extra temporary uprights (double 2x4) would be a good idea while banging things back together. And some things remain unsaid - like common sense. Don't bang the sledge directly on the wood - put a piece of wood or plywood over it first, etc.