Ten trips sounds like a lot. Are you really collecting 150 goods per settlement?
Yes, you can upgrade the capacity of your suit. But if you're collecting 150 goods and filling the suit up enough to return 10 times, the upgrade won't help you much because it only doubles your capacity to 30 (goods) and 60 assets. So you'll still need to return to your SRV 5 times.
Although, when I play the game, I had to return to my SRV maybe once per settlement before I got the upgrade and mostly none since I upgraded (mostly, I do sometimes collect more than 60 assets). So I'm lucky I suppose.
We'll maybe see you back when you innevitably hit the 1000 cap for assets. Yes, it's annoying. You can sell some or trade off for other items at the bar. Try to focus your assets on the main ones you need for the weapons and suits you want to upgrade. Just preempting the future thread on this one. If you can collect 150 goods per settlement, I imagine you'll be collecting about 500 assets per settlement so you should hit the 1000 cap after two settlements.