It will make traveling easier... don't have to wake baby to go to bathroom or stop and eat... My DD and I talked about this very thing, securing a car seat in MH. She stated dinette with benches would be first choice, so child could stay rear facing, especially for a very young baby. Later, where ever car seat can be secured best. Don't know about Prevost, but side mounted sofa's in many MH's have seatbelts.
If you need to take baby out of seat to change or feed, I would only do it during low traffic situations and would really suggest stopping somewhere. You can always pull into a rest area, feed and change and be back on the road in just a few minutes. Great options when the baby becomes mobile, you can let them out into the space you know is clean, when you stop along the road. No crawling or toddling on unknown nasty surfaces.