Unless you are going at a very busy time of year, you can go to the resort parking lots and get a 3 hour parking pass- you don't have to have a dining reservation. We go to the Boardwalk or the Poly just to hang out some evenings, and have never had a problem getting a pass- we just tell the guard that we are going to visit the resort.
I do definitely agree, though, that the parking lots at the resorts are NOT for bypassing the park lot fees. We would never park at a resort to go to a park. I don't feel I am doing anything wrong, though, if I want to go explore a resort and park there for an hour or so.