I got the hot dog one from HF (%39) and it works well, even use around the garage at times when too lazy to move to the larger one in the shed! Do need to buy the hose and connectors but they sell a kit for around 15$. Total cost for everything is around $60 when on sale. It is 120v but thats why you have a generator if need to use right? Also carry a 25 ft 14 gauge extension cord so can plug in and move all around the vehicle. the self coiling hoses are pretty good but prone to fail after a while. Mine has small crack have to replace with an inline connection, but bought the 25ft hose from HF just havent hooked it up yet.
The reason for the hot dog style is that I can lay on side and fit in storage bay in slid out. Will go to about 125 PSI I think it is. I do recommend the snap on chuck so you dont have to hold it on the valve.
As to pressure gauge, I got some from Camp world and a couple off amazon. They are digital ones with straight chuck feature ($25-35). The ducks head are a PIA to get to rear inside valves at times. I put the 4 inch solid extensions on the inner rears so that it is easier to reach and read/fill as needed.
