2nd vote for the short local trip. I took a notepad for making lists, actually ran to the local Walmart Saturday afternoon and picked up lots of the things I needed, spent most of that night installing some of it. Then ordered a bunch of stuff from RV places that following week (Walmart usually has a pretty good RV section but some of it is junk and some things can only be found in RV stores). Also bought some stuff at the campground store, who knew you would need 10 different colored trains for the Mexican Train dominoes set?
Enjoy the process and think outside the box, there are many ways to solve the same problem. Don't forget to get a roll of that counter/drawer cushion pad, I used a piece between each pan, in most of the drawers (stops the sliding of things) and even in the medicine cabinet to keep my tooth brush from disappearing into the back corner.