Birthright is the general label for a 10-day all-expense paid first trip to Israel. Within that umbrella, different providers organize the actual trips. Some of these providers offer options geared to orthodox/frum/glatt kosher/single-sex participants, for instance
Ezra World (a youth movement) offers men-only/women-only/couple glatt kosher tours
If I understand your question correctly, you're asking specifically about the middle 38 years. I have a partial answer to address that time, and I can flesh this out further with times for the first and last year as well if you'd like.
Har Sinai: Left on 20 Iyar, 24491
Travel to Kivros HaTa'avah: 20-22 Iyar, 24492
Kivros HaTa'avah: 22 Iyar2-21 Sivan, ...
dinonline answers your question here and writes Birkat ha-gomel should not be recited for a short fishing trip
Shut Kinyan Torah (Vol. 1, no. 16, sec. 3) writes that somebody who
sails across the Channel between England and France does not recite
the blessing because the journey is short: Just as those who cross the
desert only recite ha-gomel after ...
I think that the rule you assumed is written in Mishna 1.1.
זה הכלל: התולה בעצמו, חייב. והתולה בבית דין, פטור.
This is the rule, one who follows his own opinion needs to bring a personal Chatat, one who follows the Bet Din needs not bring a personal Chatat.
The mishna 2 treat cases in which he doesn't know that Chachamim changed the Psak. And ...
R. Yosef Yedid (Yeme Yosef §9) discusses the permissibility of a talmid chacham (i.e. an individual who sits all day and learns) or Torah-teachers refraining from fasting. From his responsum it appears he would also permit an employee [of secular occupation] to refrain from fasting since the unproductiveness amounts to stealing. As precedent he turns to ...
Someone asked R Shlomo Aviner that question regarding traveling on the roads of the West Bank which some certainly consider dangerous.
He writes one can travel to places where the danger is uncommon (Rabbi Kook, Mitzvat Re’eiyah 3:17)
We must to distinguish between cases of “harm being common” (Pesachim
8b), where we have to be cautious, and cases of “...
One one is not exempt from eating in a Sukkah when going to work Holchei derachim in ones own town or staying in the same town for 3-4 days to work Mishna brura 640,8 45
וכ"ז בהולך מכפר לכפר מדינא א"צ להמתין מלאכול רק המחמיר אבל בשוהא בכפר א' שלשה או ארבעה ימים חייב מדינא לעשות שם סוכה [אחרונים]:
Only someone that travels from town to town for work ...