I find it useful to carry an inflator, which is a small diapraghm compressor without a tank, capable of 100-180 psig but slow to fill because rate is low. I use one to top off my RV tires (65 psig and 80 psig) or bicycle tires (80-100 psig). I've used it once to fill a flat trailer tire, it took a long time but the job gets done.
The inflator I carry is a 120V Campbell Hausfield, probably bought it from Sears or K Mart 40 years ago, made in Taiwan back then. Bought one for SIL about 20 years ago, was then made in PRC, but basically the same compressor. Duty cycle is about 20-30 minutes, which is what it might take to fill a flat truck tire.
There are smaller infators that run off 12V, my brother has one that struggles to fill pool toys to about 5 psi, another SIL has a better one that can top off car tires, don't know how it does with a full tire inflation. That one is from Harbor Freight, but probably old enough that they are now selling something different.