Can You Out-Grandpa Grandpa?

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Across
  1. 3. associated branch of military, later in life
  2. 6. grandchildren
  3. 9. slept in tiny room off kitchen at 43
  4. 13. business alias
  5. 14. hiker, cycler, adventurer
  6. 17. best additional ingredient on PB sandwich
  7. 18. real estate trust
  8. 20. model of novelty car owned by Don & Donna
  9. 21. favorite boat on Brandy Pond
  10. 22. birthplace (probably)
Down
  1. 1. bought their first car at a yard sale
  2. 2. Don's worst dog
  3. 4. took important exam for him (allegedly)
  4. 5. Don & Jacqui's canine
  5. 7. war served in
  6. 8. child most endangered by Don
  7. 10. with 15 down, company started
  8. 11. named for avenue of residence
  9. 12. prefers this to swimming in water
  10. 15. with 10 down, company started
  11. 16. inherited this person's pet
  12. 19. namesake