I would have no problem with 30 miles a day except for one small item.... my butt would fall off, and I'd never walk again.
Riding a horse is truly something you need to do on a regular basis to do it well over a long period of time.
Same with bicycles, btw. I recently got a bicycle for local trips and blithely headed out to the grocery store, a 4 mile round trip.
Since it had been 35 years since I'd been on a bike, it quite earnestly kicked my @$$.
I can do the ride today with no problem, but you don't just wake up one day and do it.
/johnny
That's the same with most things. There's a learning curve. Those people who have a freezer stocked with heirloom seeds will starve to death unless they have a garden already going. Same for those who have a gun or other weapon stored in a closet who haven't used it in years or never used it. Just walking further than the end of the block will do many people in. Sure, they claim they're going to go all Mad Max but many couldn't change a flat tire much less be able to get out of Dodge in their low to the ground not so Smart cars. They'll be sitting on the side of gridlocked highways blubbering because their gps and i-phones won't tell them what to do.
Katrina and Sandy showed us that getting out of Dodge is all about timing and a good set of paper maps. Look to the warning signs and act while there's still time. Be prepared to move at a moment's notice. Have various routes marked out and drive them ahead of time. Never let the gas tank get below half and/or have extra fuel stored. Know where you're headed and have back up destinations.
Back during the Cuban Missile Crisis, my parents never let the tank get below half. Many people had backyard shelters though those might not have been anymore safe than our teachers having us do drills by crawling under our desks. We had two destinations, one an hour away and the second an hour beyond that. Both were/are relatively self sufficient and away from the city. BTW, we're living in the first one now and still have part of the other one but the parcel the house is on was sold and has illegals living in it, sigh. We've wanted to put one of those little pre-made cabins on it but just don't have the budget.
Katrina and Sandy also showed us that the zombies will stay in the city and won't venture far outside the metropolitan areas. Anyone outside an hour's drive (normal hour's drive) is probably safe for a two month upheavel. FYI, you Texas folk, stop by your local tourist center or chamber of commerce and pick up FREE maps of surrounding counties. They're brown with blue writing on the front. IIRC, they're published by a company in Llano but the owners are only there part time and won't return calls so you're on your own getting maps outside your area. They show the little nothing back roads, show locales such as churches and cemeteries, and mileage down to 10ths so are handy to have in your vehicle.