I think explaining that you are not a guide is a good idea. Explain also that you enjoy the solitary nature of hunting. Perhaps there are some hunting opportunities nearby,public land or gaining permission to hunt another parcel. You can get together in the evenings to socialize. Explain that the freinds need to experience the rest of the process to appreciate it,the scouting the stand placement and even the permission aspect. If all this is too much and they just want to "pull the trigger" there are a lot of outfitters who will gladly accomodate them.