A note- I can't believe it's right at the cost breaking point now- drive or fly.
Make a lot of pals in the cities in your section, exchange staying over with the closest ones.
Play more in your section- it is very tough nationally to tag along (back and forth sharing rides and parents/chaparone) because at that point guys are pretty high strung and it's tough to hang out for an entire day waiting on someone else's matches- unless you are related.
You are talking about some pretty "deep water" unless you are like top 10 in your section, (or like 30 in a huge section- you can figure it out- are you seeded or not?) It isn't worth chasing some points and getting blanked.
Plan and shoot for just a couple big tournaments where you will know some players- Where the city is interesting so you have something else going on so you don't stress completely out- part tennis, part vacation.
Shoot to improve your Section ranking endorsements, so you play Intersectionals or Zonals where your section will come up with a coach- If you don't know about your secton endorsements, read the book- Find a good guy who you see IS on the list, and he can fill you in, as well.