you can’t run with land either but I agree, farm land can be an excellent investment all around.
Land is worth anything only as long as you are able to work it and most importantly defend it. Lacking that it's just a hole in the ground into which you throw money.
After TSHTF the price of land (that trades today for, say, a million dollars) will drop down to the cost of a few handgun rounds that the new owner needs to burn to remove previous owners. Why would anyone give you anything for land if they can simply take it? If you own 300 acres of pasture, can you defend it and your cattle? Can you even *know* if a trespassing gang has shot one of your cows and is loading it into the truck? If you do, how do you approach a gang in an open field? What if the gang brought 20 trucks and 100 soldiers to steal your entire herd? A single man, unless he is one of those movie heroes, has no chance of getting out of that alive, let alone saving the cattle.
Unfortunately investments for peaceful times and investments for TSHTF times are very different. When TSHTF the best currency is high-tech items that are hard to obtain in a destroyed society - such as medical supplies, ammo, weapons. Everything else - even food - is renewable and is better obtained when you need it, by trading one of those items. A suitcase full of drugs will be priceless.
IMO, holding US debt, TIPS or not, is not very valuable. The government can print as much of the money as it wants, and the same government tells you what the inflation rate is. In essence, you are buying a paper where the issuer is free to pay you whatever he wants.
The trick is to invest as if the time of peace is all upon us, but be ready to pull the roots out and reinvest into TSHTF commodities as soon as it becomes prudent. Needless to say, the longer you wait the less you can recover from your peace time investments; but if you wait too little then your TSHTF investments - which pay no interest - only take space in your basement, and their "use before" dates come closer and closer.