for $39 you can get a small 120v 120psi air pump at harbour freight. Its a hot dog style and actually works well. I have used it to nail some light work together and it does good on trailer/rv tires also. It will fit sideways in the side compartment in the rv thats below the dinette. Just make sure you have a good extension cord so you can move around with it. or make sure you have elecoutlets on both sides of the rv to plug into.
BTW where do you plan to travel that you fear no stations are available? Most circle Ks, qt's and small stop and goes have air pumps available might cost a .25 cents to use but they are available all over. As noted if in middle of no where you have more serious problems than a low tire.