OP, unlike Dutch and trailertraveler who only have sat TV, I've had sat TV for about 15 years and sat Internet for about 2 years.
Though sat TV and sat Internet both use dishes and both aim at satellites, I've found the similarity pretty much ends there. First and foremost, sat Internet uses much bigger dishes. For example, the rooftop Winegard Travler dish (which is just a 1000.2) is about 26". On the other hand, my HughesNet Gen 5 dish is .98 m (38.5"). That's a whopping difference in dish area and consequently in the ability to acquire satellites.
Like sat TV, I experienced some rain fade on the big HughesNet dish while camping in the mountains near Yosemite, but it wasn't significant enough to degrade my sat signal.
Less than ideal sat Internet dish position
You would probably have to do the same thing for a sat Internet dish. However, the larger sat Internet dish should make it easier to acquire a signal . . . and you only have to acquire ONE of two possible satellites with HughesNet Gen 5 (typically Echostar 19 @ 97.1W).