You are still using dial-up? Has your local provider given you any options to transition from a PSTN phone? I'm not being facetious, analog copper phone lines are going to disappear unless something in the FCC and industry changes simply due to lack of maintenance.
There's zero reason any of the telecoms will want to keep copper lines going unless they are already currently capable of supporting DSL in high density areas (e.g. close to central offices) and the FCC is encouraging switching to IP-based phones as quickly as possible, so there's not much sympathy in continuing the regulation as a common carrier monopoly that required rural copper in the first place and they will fall into disrepair even if technically they are supposed to continue to exist.
Point being that if being semi-off the grid and not having access (or budget) for DSL, cable, satellite, microwave or cell-based Internet is a real issue. Public WiFi or access at libraries only gets you so much flexibility, not to speak of inconvenience. However getting stable, slow access at the most difficult-to-service fixed location is better than relying on the availability of maps online real time while traveling in the backcountry, so having preloaded SD cards mailed to you for a digital mapping solution might be an option.