Answer:
Para1: introduction and state your 3 reason for writing
para2: elaborate/explain 1st reason
para3: elaborate/explain 2nd reason
para3: elaborate/explain 3rd reason
para4: regards and closing words
possible reasons to take trip: haven't seen eachother in a while/ misses them
opportunity to have adventure together in road trip
to make memories before you settle in Oregon and would not able to interact with them again for a while
first time experience with traveling to Oregon and would appreciate the company of a familiar person