We are taking my parents to WDW. My Father is mobile to a point. He can walk 1/2 mile or so at a time, but cannot do stairs and cannot stand for extended periods of time. We are staying at WL and can't decide between on and off site rental. He's not "excited" about using the ECV to begin with and I'm afraid that if his ECV means transportation confusion or extended waits for buses/boats, he may just tell us to go on without him.
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In this scenario, would it be better for us to rent at the parks or am I worrying unnecessarily?
We have multiple ADRs before park opening, will that have any effect on our transportation?
If we don't rent from outside agency - will he be okay getting to/from HDDR Chef Mickey's and MBYBBQ? I can't figure out how much walking that entails?

In this scenario, would it be better for us to rent at the parks or am I worrying unnecessarily?
We have multiple ADRs before park opening, will that have any effect on our transportation?
If we don't rent from outside agency - will he be okay getting to/from HDDR Chef Mickey's and MBYBBQ? I can't figure out how much walking that entails?