If its just for a daily psi check & possible top off, you don't need high air volume (cfm) and the pressure need only be adequate for whatever you have to inflate. Compressors typically advertise a high max psi to attract buyers, but rarely deliver much cfm at those pressures. The one Lou suggests only delivers that 1.35 cfm at a much lower pressure than the 150 max, but it's probably adequate at the 80-90 psi you will be using.
Most inexpensive 12v compressors have small wires, which both increases fill time and causes overheating and premature shut down. If you go for a 12v model, make sure what you get has decent wires and battery clips. Viair makes good stuff but it costs more.
120v is a better choice IF you will be at campsites with power or carry a genset. If not, a 12v model is probably a safer choice, even though they tend to struggle at higher volumes and pressures.
