I've noticed one oversight in GH1. Most of the cities in GH1 are connected together by intercity bus routes. However, the following routes are non-reciprocal:
1. Namok to Gyori
2. Wujung to Mauna
3. Ipshil to Snake Lake
4. Snake Lake to Wujung
Gyori and Mauna, in fact, have no bus routes out at all. Which means that if one loses one's mecha in either town, one has to hike out.
Also, Gyori is rather more likely than other cities to be the location at which a player becomes mechaless, since it has the hardest of the initial three arenas...